Some commenters have pointed out that we say "after our lineage split with chimpanzees," "members of our lineage after the split with chimpanzees," and "after our split from chimpanzees" at various points in this episode. Just to clear things up, humans and our extinct relatives share a common ancestor with chimpanzees and their extinct relatives. After our lineage split from this common ancestor, we call our group "hominins." Living chimpanzees also have their own separate evolutionary history since that shared common ancestor.
Could the culprit to hand dominance could be tied to agriculture development along with g protiens from early generation of gmo growth hormones which caused intellectual growth to the broca after its cycle thru the gaba system.
@@kayzeaza If you're dumb enough to get confused with "Split From Them," and "Split With Them," maybe go back to English class.............. And if you wanna go into it, we did split "FROM THEM," notice how they're still around and the in-betweens aren't. Please make an argument someone older than 5 should make.
I was actually born left handed But I had a stroke when I was very young which paralyzed the left side of my body meaning I had to grow up right handed instead. My favorite joke is “ I’m ambidextrous, I just can’t show you right now”
My sister had a stroke 14 years ago. She was right-handed but is now a leftie because her right side doesn't work. She also uses her teeth a Lot from getting dressed to opening things to holding things.
There was a family I knew growing up where a lefty man had married a lefty woman. And they had customized their house to accommodate this: the door hinges, doorknob turns, the refrigerator door, the drawstrings for the blinds etc. Spending time there felt like living in an Escher painting.
Yeah it’s everywhere. Just today I was thinking about this while I was messing with an automatic type knife. It’d come out into a left handed person’s palm.
Took a fencing course in college, was one of the best in the class. Finally went up against the other lefty. We engaged and backed off perplexed. Nothing worked the way it was supposed to.
I’m also a lefty fencer. I’ve had the same problem. My class rival and I are always trying to one-up each other, but fencer each other is annoying because we’re both lefties.
Yep, I'm a lefty swordsman too (larp rather than fencing), can confirm I've had the same experience. Running into another lefty threw me off almost as badly as it usually throws righties.
NOT in japanese fencing styles- our Law " there are No Lefthanded swordspeople" --- we play Right. worth the effort, and our advantages as lefthanders are more discreet . not to mention the right side and The Brain benefit lots .
I came to say that LoI . It's actually worse if you're left handed (like me) Think about it. All the fencers in my class got to fence TWO lefties. My comrade and I only fenced ONE!
Same! But where I was, everybody in the region had already fenced many lefties so in both epee and sabre I didn't have as much of an advantage as I wanted :D
Footnote: left-handedness had survival value in trench warfare of WWI - soldiers throwing improvised explosives in the dark with their left hand were less likely to be picked off by snipers (who would routinely shoot to the wrong side of the glowing fuse).
That’s interesting, can you provide a link or article to confirm this? The US taught lefties to hold grenades upside down so what you’re saying appears to contradict this which is why I was hoping you’d have some evidence to help clarify the discrepancy in information available
@@TheBreechie My knowledge is anecdotal. Australian soldiers, including my grandfather, landed on Gallipoli in 1915 and had little or nothing by way of ‘grenades’ supplied to them. Under constant fire from Turkish snipers, they would fill their biscuit tins with gunpowder, add an improvised wick (which would glow fiercely in the dark) and emerge briefly from their trenches to throw the resulting bomb.The Turkish snipers would routinely aim to the right of the glow - and, if the ‘grenadier’ were a lefty, the shot would miss. Hope that helps.
About 40 years ago I worked at a company that made woodgrain trim for Jeep station wagons. It was bent by hand . I noticed that if a lefthanded person learned to make a part on one side of the car he could immediately make the same part for the other side. But a right handed person had to learn that side the same way as any other part.
Also, because they use both sides of their brain more and slightly differently (as covered in the video) this might result in being able to develop spacial thinking and skills better (e.g. mirroring an object in your head)
Apparently this is the real reason for Leonardo's "mirror writing" - it let him write in a direction so that he wouldn't get ink on his hand. There were even books in the 15th century aimed at lefties explaining how to do it.
Left handed advantage in fencing is actually insane. It's not about surprise, it's about having to invert all your well trained motions when fighting a left-handed person.
Being a right handed judo player, grappling with a lefty always feels awkward whereas for the lefty it's business as usual. What's really funny is when you see a really good lefty finally come up against another lefty, because they suddenly look like a beginner again, with neither player knowing how to actually set up their throws because they so rarely encounter one another.
Came here to comment that, I did judo and was trained left handed as it came easier to me (even thought I write right handed). I also boxed left handed
You might be interested in how handedness has affected architecture. You will find that in medieval castles and other fortresses that have stairways , those stairways hug the walls such that upon ascending the walls are invariably on the right hand side. This is because it inhibits the movements of right-handed invading swordsmen, giving the (also right handed) defender above an advantage with greater room to swing his sword. Now, a lefty attacking would nullify a lot of that advantage, but the defender would still have the height & weight advantage of striking downwards.
@@ukcroupier That says a lot about wealth and is entirely unsurprising that everyone had to learn to use a sword in their offhand so that one guy wouldn't have to.
In single combat shields become much less effective too. Sure you can still put a shield in front of you but if my sword and your sword are on the same side I can attack from an angle you can't defend as easily from, and while the other way around is also true a leftie would have fought more righties than a righty has fought lefties
Knew a girl in High School who could write cursive with either hand neatly. She could also write cursive with either hand as a mirror image neatly. It was fascinating.
My 12 year old uses both hands well depending on what she’s doing. She will write with her left then get tired and switch to the right. I have 2 other kids. One is strictly right handed and the other is strictly left handed. My 12 year old will use whatever hand is easiest due to which sibling she happens to sit next to. We have quite a bit of lefties in our family.
I often challenge people to tell me which hand I signed my name with. You have a 50/50 chance... to get it wrong I am literally listed as ambidextrous by the military/va I can throw a football/baseball with both hands and shoot basketball. While I do have preferences in many tasks, I can always perform said tasks with the opposing hand with ease. That does exclude specific training... (like baseball) I can throw a ball ~65MPH Left Handed, but as a kid I trained to throw right handed so I can throw 85MPH right handed... (I only had a glove that fit my left hand since we were VERY poor and I used hand me down equipment. My twin sister would take the glove off to throw left handed while I found that to be cumbersome)
I was the only left handed kid in my 1st grade class. The other kids wondered why I always had lead pencil stains on my hand. Right handers don’t know our struggle.
im right handed but i draw a lot so when i used to use pencils for everything, my hand would always be shiny and silver. it causes a lot of smudging on my art. that mist be so annoying while writing a paper especially if you need it to look clean
have we considered that the less-lateralized brains in lefties could be a result of lefties being forced to do more tasks with their right hands, since the world as we know it and the majority of the tools we make are very biased to right-handedness these days? like having to navigate keyboards, guitars, door handles, etc. (all put the important things on the right side), forcing these people to adapt more significantly than a right-handed person would. not to mention cultures where your left hand is the one you don't eat or touch with.
I agree with that completely. I have been using more variety of tools lately and can tell when a tool is specifically right handed. Skill saws for example
I'm VERY left handed but don't really encounter problems in the modern world due to that. As a kid, there weren't any real left handed scissors, but that's it.
This is absolutely true. Left handed people need to constantly learn how to use tools and activities in the opposite way they were designed. I've always thought it helps with things like problem solving
@@pello7048 i agree but when u say something a lot of right handed people cant see what u mean just looking at it sometimes cause theyre evaluating from a different angle. Me and my boss have got this down pretty good. I do the lefty stuff. He does the righty
@@pello7048 As a middle-aged lefty, I never "had" to learn how to use tools the "right" way. Fortunately I was not in the generation where lefty kids were forced to write with their right hands, which actually has been proven to be psychologically damaging. Right handed ladles in the kitchen, still used my left hand - probably enhanced my coordination to pour precisely from a less pointed spout. Right handed scissors only available in school, cool, I make them work with my left. Right handed baseball mits only available, figured out how to make it work. It wasn't that tragic. Call it forced creativity, but I'm sure there was a benefit to our 10% of the population.
Funny story: i worked with a guy who applied for a grant from an organization that supports and recognizes left-handed people...he wrote out this multi-page essay about how he wasn't even left-handed and essentially just wrote this essay out of sheer boredome... they ended up giving him the grant because....he literally was the only person to submit an essay for this grant!
Being left handed and living in a right handed tool world, has given me almost ambidextrous nature. I can pitch a softball, bowl, and anything else done underhanded with either hand. I play drums open handed on a right hand set, which is 100 times easier than crossing your right hand to play the hi hat. I play guitar equally bad left or right handed. Overall I would rather be left handed than right handed, except when a fountain pen is involved.
I’m generally considered a lefty because I write left handed, and mostly use silverware and cutlery as a lefty, however, I can pretty easily switch hands for eating, unless I’m using chopsticks, which I can only do left-handed. However the reality is much less clear. Ive found that things requiring strength or fine arm control, I tend to do right handed. Examples, bowling, throwing, tennis, volleyball serve, golf, etc. Things requiring fine finger control like writing and chopsticks, I do exclusively left handed. While I can cut things with a knife in my rot hand, I don’t have the same level of control, so use a knife almost exclusively left handed. I use right-handed scissors, exclusively, with my left hand. But i can switch hit as a batter, more power right handed, more accuracy left handed, probably because I’m right eye dominant. I shoot pool with either, started left, have been switching to right because of eye dominance. I shoot rifles and shotguns right handed, but can easily user either hand for a handgun. I kick a ball right footed, but can play soccer and control the ball well with either foot. I use a mouse of trackpad with my right hand, totally suck at using them left handed. I can write on a whiteboard/chalkboard almost equally well (or poorly) wither either hand, as that’s arm and wrist control, not finger control. Also, I juggle, which has no particular hand dominance. Tool use varies, generally following the same strength/control factors outlined above. Hammer right, most power tools are either hand with a tendency to use them left most of the time, but ability to switch as needed. Hand saws vary, usually left for fine control, right or switch for strength. Basically, a mish-mash that mostly follows the patterns I mentioned in the first paragraph, with a few things are exclusively left or right.
For me even as I'm forced to live my whole life as righty it's harder for me to handle delicate task with my right hand. e.g drawing, putting threads on a needle, or using a chopstick. Basically I'm now ambidextrous with caveat of my right hand being pretty clumsy.. which actually a huge thing for me since I always thought myself as suck at drawing or handicraft for over 20 years before I discover that it's okay to use your left hand for stuff. The biggest tell for me that made me realize that I'm left handed is actually from reflex. whenever I'm about to do or take something.. Even after years of being righty, my left hand always moved first by reflex.. it's feels more natural to pick up dishes or opening the door with my left hand.
@@JeSt4m I hate hearing about people being forced to use their right hand. A teacher tried that with my older brother, Dad was also a lefty and was having none of that crap. My 3rd grade teacher allowed my to use my left hand, but insisted I was placing my paper in the wrong position when learning handwriting…again, Dad stepped in and had a word with her telling her in no uncertain terms I could position the paper in any that worked for me when writing.
It had taken me 18 years to realise that everything around me was designed for right handed people. I always wondered why I sucked at pc gaming. It wasn’t until I was 18 and during my first ever exam that I saw someone asking for a left handed chair( there was a table attached to the chairs) then I asked for one and I was blown away by how much since it made compared to the right handed one. I took it for granted that my hand movements sucked but now I know why.
I’m left handed, I recall my parents buying me some left handed scissors as a child, and I still have them 20 years later! But, I have no idea what a left handed chair is? Can you elaborate?
@@vichentez some chairs (in a school for example) have a built in little desk, that comes out of the right side of the back of the chair. the left handed chair would have it on the left, since a left handed person would have to write with their left hand
Eons: "Turns out Neanderthals have been using their teeth as a 3rd hand for quite a while." Me, using my teeth to hold something while opening a door: "Oh, you don't say."
My exact thought...when steaming a dress, I hold the steamer in my right hand, and my left hand and teeth to hold the dress taut to get the most effective straightening.
King Solomon had all his left-handed fighters in one division. I can imagine how that can be advantageous if the enemy is facing waves of attacks, and suddenly one wave are all left-handed.
Im actually an advocate of using the left to write and the right to shave, comb hair and brush theeth but I cut with the left while cooking and with the right while eating. The non dominant hand is called for certain tasks and training to use it is beneficial to both hemispheres.
I put “handed” in quotes to align with the article and yes, we use the word “hand” because we go clockwise or the “right hand” because I use my right hand to turn in that direction. Most horse are “stiff” on the “ right hand” and “hollow” to the “left hand”, meaning they take too much pressure on one side and not enough on the other. Horses also tend to prefer one canter “lead” to the other.
So do dogs, cats, monkeys, even fish. What they were saying about no other animal not having a preferred side is flat out wrong. It’s simply evolutionary for complex organisms because it helps with short cuts in the brain.
Right-handed people will never know the pain of having to write left-to-right with a number 2 pencil all throughout school and constantly having to scrub the graphite off your hand because of how it smudges as it moves over what you just wrote.
Smudges still happen if I write a card on the wrong kind of material. Also looks a little odd with that left hand bent at a right angle to the forearm. My grandfather wrote with the top of the letters slanted to the left.
I’m friends with a pair of twins, one right and one left handed. This is called mirroring and occurs when the developing egg splits after a certain time. Identical twins (both right handed)divide before then. I wondered if it’s possible that some lefties could be the remaining twin after an early foetal loss. Often embryos lost very early on are not even noticed as more pregnancies end spontaneously at such an early stage. Just a little pondering of mine.
Since childhood I've had a Quaker Parrot that is decidedly left handed (footed? clawed?). If you hand her anything like a Cheerio to eat, she will always grab it with her left foot. Likewise she will always step onto your finger left leg first, and step off of it in the same manner. When she was about 20 years old, she fell from a perch and broke her left leg in 3 places. The vet said they didn't have much hope for her surviving the injury, but we gave her constant care and made sure her leg was always well bandaged and dry. She made a full recovery and regained full use of her left leg which she still uses almost exclusively for any task. I've never had another animal with a distinct preference for one side over the other but she was determined, even with a serious injury to continue using her dominant leg and the vet believes that it was her constant use of the leg after the bandages came off that allowed it to regain all of its strength.
My parents only noticed that their dog was left-pawed after having him for 5 years… If you ask him to “shake hands”, no matter which paw you put your hand in front of, he will only shake with his left paw.
My daughter is left handed and self taught herself to play the guitar. When we finally took her to get professional lessons her teacher was shocked that not only did she play left handed but she also perfectly played her chords upside down. He said he, as a professional should correct (not playing left handed) the upside down playing but it intrigued and fascinated him so much that he allowed her to continue and it actually was her greatest strength
I have a friend who also plays that way. It baffled me at first, then I tried imitating him but failed. I always wonder why my dominant right hand seems to be worse with chords than my left hand when I first learned the guitar. Strumming with my left hand also doesn't work lol
@@arifb222 I play a little bit of guitar for fun ,right handed ,and have always wondered if I would have started left handed what the results would have been .Had an old guitar player tell me once the magic is in the picking hand and hopefully your fretting hand can keep up.
A thing that has always been noteworthy for me: when I was really young (4 or so) my left handed aunt taught me to knit and crotchet using my left hand. I am otherwise right handed, but on both sides left handed-ness is very common. She grew up in a time that forced her to learn to write with her right hand and later remarked that she didn’t even realize she was teaching me on one hand vs the other. I still can’t make my brain knit or crochet using my right hand as a dominant hand. I think it’s because I was taught so young that the muscle memory is just engrained that for these two crafts it’s a left handed as dominant hand task.
A friend broke her arm when we were in second grade. I started practicing writing my name with my left in case I ever needed to sign a paycheck left handed. It was for naught 'cause I broke my left arm in my 40s
When I broke my dominant arm, I startled nurses when I was able to competently utilize a fork in my non- dominant hand. But I was taught to hold my fork in the non-dominant hand while cutting with the dominant, so not really a big issue, since I had always conveyed food to my mouth with my non-dominant hand.
I used to go bowling with my friends once a week. I suck at bowling, but somehow managed to bowl a turkey one time when I broke my right hand and had to bowl with my left hand.
You used a quotation mark. I was trying to understand the quote when I found no closing quotation mark, and then I finally realized the quotation mark came right before a word that was abbreviated, and figured out it was supposed to be the word: 'cause. I wish stuff like this happened to me less... I take things too literally.
Common misconception from those who live in the 60% of the world that drives on the wrong side of the road 😉 Driving on the left of the road is the righthanded approach... At least, it's the righthanded way with the standard configuration of car controls. Naturally, it is safer to do the more complicated, safety-critical action (steering) with your dominant hand, and do the easy muscle-memory activity (changing gears - there's only a limited number of points you need to move the stick to) with your non-dominant hand. Take manual gearshifts out of the equation and it comes town to preference, which generally comes from what you're used to. So if you have spent your life in a left-hand drive country, then you'll probably think "driving from the left of the car is the natural way". But if you have spent your life in a right-hand drive country, driving from the right of the car feels more natural.
@@donkmeister I dunno. I'm right-handed, and I'd prefer to have half a car between my valuable right hand and a drunk driver. Better to have the left side exposed, it's more expendable ;)
@@mal2ksc the odds for recovery of my favourite parts are better than fully smashed. It works like COVID: the more you stack the odds in your favor, the better your outcome will be over time :)
Nah you just learned use the left side of your brain when you use your left hand everyone else uses the left side only for right side body interactions. The right is completely useless at drawing because it's incapable of determining distance, space or time. It can describe what objects are and how they interact but fails miserably at outlining them. That's why right handed people never become ambidextrous or if they do are poor at best at it.
@JohnDoe Yep yep. Can't wait to see everyone at the secret "Left Hand/Right Mind" meeting. This years topics are: Lists, do we need them? & getting up before 11am, another obstacle designed by right handed idealists.
As a righthanded person who plays guitar, I'm often amazed at the intricate fretwork I can accomplish with my left hand. Yet, if I try playing lefthanded, the same left hand becomes utterly spastic when I use it to strum.
I'm a mixed handed person who plays guitar right handed. I just tried to play left handed. I noticed that my left hand is bad at plucking/strumming but my right hand is down right useless at fretting. I think in general my left hand can do a better job of copying things I'd normally do with the right, but the right is not as adaptable.
I'm a leftie who plays right-handed because one of my first teachers said it would be easier. As others say it would be near impossible to change now. I think it's as much to do with training than handedness for guitars, plucking and fretting are very much learned skills (not intuitive).
@@blitheringrando1410 right? It seems more logical that the right hand would be the fretting hand (for a right handed person) as it requires more fine motor control with some of the triciker chords, arpeggios, hammer ons, bends etc.
PBS host: Being a leftie can have advantages Me, a leftie: oh really? How many decades/centuries did it take you to make scissors that work for both hands?
ikr lol. As a leftie you're forced to learn how to used tools, eat, etc using right hand. Some people demonized left hand so much they would constantly asked about why you primarily used left hand lol
As a leftie, I can use scissors quite erm, handily. I’ll posit that lefties are better at adapting to their environment. There is a much higher preponderance of lefties among aviators than in the regular population.
@@karsten69 My icebreaker doesn't work that well ... "Hello, I'm austitic" tends to end the conversation rather quickly or makes it way longer that it needs to be. @Jay Bird Also... Ambidextrous is indeed the way to go, welcome to the party.
Im whats called Cross-dominant. I can use both hands, but for different tasks. I cant write with my right hand, but I play golf right handed. Some things I can do equally well with either hand. Some things I suck at with both hands. Playing things like tennis or rounders when I was a kid always confused me. I never knew which handedness I should be.
@@murraysmith595 my grandad was right handed through and through, apart from cricket, which he played left handed. If I inherited left-handedness, however, it probably wasn't from him. More likely the other side of the family, which is wrought with lefties. I think I just adapted to the right handers way of the world
@@peterharrison5833 I am sorry. I went to school with a set of twin one left one right. Good school let her write with her left. Good humans do good things nicely.
I am a RN and I worked on a neurological unit for several years. Part of my patient population was stroke victims. One thing neurologists and neurosurgeons always note is the patients dominant hand which identified the patients dominant brain hemisphere. This is because if a person had a stroke that effects the non-dominant side of the brain, they have a higher percentage of recovery because the dominant side of the brain can take over for the damaged side. Now this is very simplified and there are many other factors, but it was always something that was noted in their records.
What is an RN? I'm so used to military videos that I thought it was Royal Navy. I'm guessing it's some type of nurse but what is an R nurse? I've been reading reading a couple of Wikipedia articles on left and right handedness during watching this video. And some of the writing and Wikipedia is terrible. Instead of writing right and left there are several sentences where they say right and "non-right-handedness" Instead of saying right-handed and left-handed. Can you imagine writing "non-right-handedness" instead of left-handed? :-)) It makes reading it difficult because there is mixed terminology between positive and negative depending on the study that they're referring to and then they're mixing positive and negative when using a terminology for right or left-handed instead of just using right or left-handed. And Wikipedia writers can be quite crap! Strange how some studies can say one thing and then another set of studies can say the opposite thing and then another study can say there's no difference at all. They can't all be right.
One important group is left out of this conversation-- musicians. Most instruments incorporate equal dexterity in their mastering. Born right handed, playing drums made me reasonably ambidextrous. They even have a name for it--"matched grip"
As a leftie I’ve often wondered why right handed guitar or other string players play the way they do. In my perspective, I’d rather have my dominant hand doing the note positioning rather than the string plucking but I’m assuming this is just my view. So yeah, I’m a leftie that happily plays a right handed bass guitar.
@@josalee6479 Being a drummer I have often wondered the exact same thing-- how come you you guys don't use your dominant hand doing the complex note positioning? This just goes to show you how we ignore the potential in our subordinate hand.
There are quite a few strongly-handed instruments, such as trombone, trumpet, tuba, French horn, etc. The trombone can be somewhat reversed (Slide Hampton), and it's somewhat easy to play the trumpet left-handed, but you need a custom instrument to play the French Horn or tuba with a different hand.
From what I found Fiddler Crabs have an enlarged left claw. If they lose the enlarged left claw the right claw grows in size to replace the lost one however their lost claw will grow back as a normal size claw. If they lose the right claw after the left has been damaged the left claw will grow in size to become a large claw and the cycle repeats. That said the left enlarged claw is for "jousting" with other males, defense, offense, etc and the smaller claw is the one they use to feed themselves with. This makes the Fiddler crab right clawed with an enlarged left claw unless the left claw has been damaged or lost.
@@diefenbaker7853 probably because the giant claw can’t reach their mouth... but if they lose their smaller right claw, they must have some way to survive until it grows back... right?
I am a left-handed woman. My aunt is also left-handed and now we have left-handed children. There’s always diversity in nature especially in humans. We have two hands, it just makes sense that some people would use the left one. We are a minority as I understood when using the Green coated scissors in kindergarten and other left-handed things in school. No one told me I was wrong because when I was a baby and my grandmother wanted me to feed myself with the tiny baby spoon I always grabbed it with my left hand. As she always gave it to me in my right hand and I always switched it into my left hand before trying to use it she became convinced I was a left-handed girl. And once she was convinced she would not let anyone in the family try to make me right handed. I really love my grandmother, bless her soul.
Even I wanted to be left handed for a long time and tried playing cricket with both left and right, I can play cricket with left but not other activities. It's all in nature.
I don't know if it makes sense. As the video mentioned, we seem to be alone amongst animals in this regard. I can totally imagine an individual animal whose hand preference, or wing preference or fin preferences is perfectly balanced. In fact, I would think that for flying animals, it would be a necessity lest the creature not fly in perpetual circles.
I once had an encounter with the greeter at the grocery store that I frequented, an older man who only had one arm (it was his left, and I got the idea that he had lost his right arm at a very young age.) I visited the store shortly after badly breaking my left humerus and was in a full left-arm cast from my shoulder to my hand at the time, and he stopped me to ask about the injury. He asked if I was having trouble doing things with a broken arm, because he had "heard that people prefer one hand over the other". It was so bizarre to hear from someone who had no personal experience with handedness.
@@JoBrew handedness and footedness feel the same with regards to preference for a specific one. He wouldn't have had to hear it from someone else otherwise
@@olopaxx I'm right handed, though not overly so, as I mentioned in another comment - I do a lot of things with my left hand. But I have *never* felt anything "handed" about my feet. Feet are used very differently from hands where one hand typically holds something and the other hand works on it.
I love that you guys not only explain the 'what', but you also explain how we know these things. I have lofty hopes that people who are less cognitively inclined can understand these things better rather than grasping onto conspiracies that require mental gymnastics to fit a narrative for things they don't understand
I had an lovely aunt (now deceased) who was a University Math Professor, and who was also ambidextrous. I was told that the 1st day of each class she would enter the room, quietly face the blackboard or whiteboard, then put up TWO complex mathematical equations - _SIMULTANEOUSLY!_ From that moment on she had *every* student's attention. 😉👍 (I miss you, Aunt Jean!)
Bro I can write decently with both hands but could NEVER write two different things with both of them at the same time. That takes some serious coordination!
I am surprised that eye dominance wasn't mentioned because there is usually a correlation between the two. When aiming and throwing and other handed activities, having your dominant eye towards the front is a huge advantage.
Yes! I just started taking an adult art class and they had us identify our dominant eye. For anyone who wants to know how do it, you hold out both hands and make your thumbs and pointer fingers into a triangle. Then center an object inside the triangle, and close one eye, trying both sides. The object will still be centered when you’re looking with your dominant eye. I’m right handed and left eye dominant, which is wild, because my left eye is also more near sided than my right by a few points. I assumed my slightly better eye would be dominant, but nope. Super interesting exercise.
@@rixatrix wow I never even thought of this. I'm left handed and I've never had glasses but my left eye vision has always been very fuzzy and all my clarity comes from my right eye which has perfect sight. Sure enough I'm right eye dominant which would make sense for being left handed.
So is there a known association with eye and hand dominance? If a person is right-handed, is it more likely that they are also right eyed? Or left eyed?
@@cutworm7027 As in, they only mirror the shape of the handle and not how the blades actually cross each other? That’s sloppy and ignorant of the manufacturer, since it’s how the blades cross each other that _really_ determines whether a pair of scissors is suited for left- or right-handed use.
My granny was left-handed and as a kid she was forced to write with her right hand at school. As a result, her handwriting always sucked later in her life. Even at old age, she complained about these experiences when she was young.
My grandma was the same. She was the only one who noticed I was ambidextrous growing up. I always confused her because I would randomly switch my preferred hand for tasks. I didn't realize I did that until she asked if I was actually left handed trying to be right.
I'm a piano player and it is usually pretty easy to see what kind of handedness the composer has just from looking at the music, most people are right handed and tend to write more difficult parts higher on the staff. As a right-handed person, imagine my shock any time my left hand has to work more than my right
Omg, is this why I don't like piano music much? I have a strong preference for lower notes - in voices, strings, brass, woodwinds, etc. If most piano music leans toward higher notes because of right handedness...
As a non piano player but with a growing interest in music structure, I assumed this was because bass lines are often more repetitive and consistent and then the higher notes sort of 'play around' that grounding line?
I only realised I was ambidextrous when I was about 10, and found out that right-handed ppl don't "just choose to use their right hands most of the times bc of social reasons". I was shook.
Being ambidextrous is pretty interesting to me. I'm actually a bit confused that I don't feel that way at all. I was born left-handed, but when my mom saw me drawing with my left hand as a kid, she told me that you have to draw with the right hand, because she was apparently afraid I would get teased by being left-handed or something like that (strange, I know). Since then I've been right-handed my whole life. And my right hand feels very dominant now. But you just never thought about which hand you were using? What about when you're writing or drawing? Are both hands the same to you?
Also ambidextrous. Back in kindergarten, my teacher forced us to choose one hand over the other, so after a week of fussing with it, I went with my right hand. It was easier to write with, with English flowing from left to right. Never really thought about being ambidextrous until I realized that I had a left preference for opening soda cans. Blew me away. I started paying attention to myself after that, and discovered my preference changed depending on what was more effective. And I was over here thinking I was doing it the “right” way the whole time
I think there are simply more neurons in the stronger side. More neurons means more muscles get activated giving more control and a stronger arm. It would explain ambidextrous people like yourselves and people who have opposite sides like being right handed but kicking with your left leg
@@Painted_Owl similar to my experience! Never had to strongly choose, but just went with whatever felt right, which often meant either hand. A few things are a bit stricter - I play guitar/bass left handed, but everybody around me said I should play with my right bc it is easier to find instruments and stuff. Bad advice, and bc I did not have a left-handed guitar, I ended up learning to play with my left hand on an "upside down" instrument. That one still annoys me haha
I was born left handed but thought I was wrong for using my left hand so learned to use my right. Now I switch between hands depending on the task or if one arm is tired.
I’m a left handed boxer (southpaw) and I used to go into the ring with my opponent in a right hand stance until my opponent was tired or if I was losing the fight. As soon as one of those two things happened, I would wait until the next round and get into my Southpaw stance and when my opponent saw the switch, you could see the dreaded look in his eyes. Priceless 😂😂😂
In the gladiatorial arenas in Rome, left handed fighters won more often cause they had the surprise and fought right handed opponents and hot use to their fighting style
I think I am right handed, but somehow in boxing I prefer the left handed stance as I hit harder with my left straight n hook, right is comfy for quick jabs though. And somehow I feel that my right uppercut is stronger than my left. But yeah i feel at home with the lefty stance.
7:23 Darts relay on eye dominance. It’s the same as in archery. It can or cannot be same as your hand dominance. I’m right handed, right footed, right eared but left eyed dominant. I discovered whe I started archery and have to either use a path on my left eye and use a right bow (with deepens sense decrease) or use a left bow, which I did
I do my eye makeup like eyeliner and eyeshadow with each hand corresponding to my eye. I can also use a knife, thread a needle, sew, and do almost any other non-writing task ambidextrously. Unfortunately when I was a kid my teacher saw me regularly write with both hands and told me to stop and only use my right hand. So I can't write well with my left hand anymore.
@@tafazzi-on-discord I suppose but it makes me sad, it would've been a neat party trick to show off how I can write with both hands lol. At least I can still draw and craft with both hands!
Jealous of the eyeliner thing. I am ridiculously right handed. To train for a rock climb, that had the crux pulling with the left hand, I trained the left arm exclusively. Like Ricky from Lady in the Water.
In Europe, passage in tunnels underneath the castles and stairways were turning right. For it was difficult for right-handed attackers during siege to strike "behind the corner". Thus, left-handed squads were formed and highly used for their striking from left to right with ease - somewhat of today s.w.a.t. reminiscence.
I write left handed and throw right handed. I tend to do more dexterous things with my left and when I need more power than precision I use my right. I play golf and like to swing right handed and putt left handed (mostly). I've always felt fortunate to be able to use both hands quite well. The interesting thing is that my left leg is quite average in opposite side coordination while I almost exclusively use my right leg.
I taught my son to read and write pre-school. I'm left handed, he just naturally copied me. However, it seems he's more naturally right handed. Now, as a dentist his ability to swap sides or hands appears to help him a little.
I always saw the advantages of using both hands since I write right handed and throw lefty. In elementary school I thought I could be doing my work and throw stuff at the same time, so I could be like “no I didn’t throw it, see I’ve been writing the whole time.” ha
@@martianmurray My father wrote left handed but threw right handed. But he could also paint with both hands. And when I did boxing as a kid, I learnt how to switch from Left to Right so no one had an advantage.
@@therewasoldcringe me too, I write with right, but most everything else left. I think I was probably taught to write with right hand in school like "normal" kids, but things that I wasnt taught to do, like doing makeup or using a can opener or using a spoon, I use left hand. there isn't anything I can do with both right and left hand. only one or the other. I suppose I am anti-dextrous
My mother was a leftie and got forced, as most were at the time, to learn to write and do other things right handed. So she became semi ambidextrous as a result - she could even hit me with either hand, though I think she preferred her right hand for that, and for throwing shit at me.
This was what I endured as a child, I remember having my left hand put in a mitten to force right handed writing, this was practiced right into the 80’s in Ireland . But I’m a true leftie that’s just learned to adapt to a right handed a world like all the other lefties....I can’t even find a left hand emoji now 🙀
Yeah. My mom lightly tried to make me a righty, but from birth I was VERY left handed. Doing things with my right is akin to using a foot with long toes. With practice, a lot is possible, but it ain't ever going to be a "real hand".
My mother is also a leftie and was forced to write with her right hand at school. The teacher would smack her hand with a ruler if she was caught writing with her left hand! That is until my grandma found out... she was a fierce lady about her kids!
My father was the opposite. He was a righty but his sister didn't want to be the only leftie in the family so she insisted that he learn to write left handed.
Octopuses have handedness and will either prefer their left front 2 arms or their right front 2 arms. They also have a lateralness about them even though their neurons are spread across their body. They also are more likely to be right-handed,and they also use tools.
I definitely think tools and handedness go hand in hand but the octopus righthandedness is intriguing. I assumed humans took up the right handed way due to being taught that way elder to junior but a documentary I watched about the intelligence of the octopus was intriguing as the young and parent have literally no relationship after birth so how does this right-handedness continue. Perhaps totally (or much more) a genetic selection whereas us humans a lot of it is expressed due to our environment irrespective of genes.
My late Dad was right handed except for eating. The first thing he would do when he sat down to eat he would swap his knife and fork. As kids we would prank him by setting his place for left handed so that he would have to do a double swap. Miss you dad ❤️
I've gone years without knowing where to use the knife and fork. This made me very clumsy until I started using them the right handed way, but I still do use them a bit strangely when I don't know what I should use the knife and fork for.
I never understood why it's standard to hold the knife in the dominant hand. This has always felt wrong to me. Doesn't the fork obviously require more precision? The knife just uses the fork as a guide anyway.
I thought about this alot recently as though I've always been right handed, I learned to do everything with either hand as i got really busy. Its surprising how easy it is to "develop " coordination in your left hand. I came to the conclusion it was easier to build tools to work with one hand than to build tools that work with both hands....from birth we get used to using our right as everything is built for right handers and watching our parents and everyone using their right, doing as we see is pretty natural..it is interesting to hear about the different parts of the brain being tied to different hands and different things we do though..
Interestingly, most horses prefer their left side, that is to say, they find it easier to flex to the left, and take longer to learn skills on their right side. Horses have a split brains, so they literaly have to learn every skill twice, once for each side. There is a theory that the costume of mounting and leading a horse from his left side came because it means we bring our stronger right side in contact with their stronger left side. And another theory suggests that we unconsciously bred left-leaning horses because we found them easier to train and ride.
This is cool I hadn't heard of this before :) my loan pony finds his right side a lot easier than his left! I heard that we mount on the left because when warriors had swords around their waist it was on their left so that they could pull it out with their right hand and getting on from the left meant the sword wasnt in the way.
@@morgans6544 my father said that British drive on the left side of the road so that their sword arm was closer to a potential enemy or highway robber on the right. I don't know why this didn't catch on in other countries.
My buddy who is right handed broke his hand & started using his left hand , he was not able to use his right hand for an extended period , he continued to use his left hand & later was able to use both hands equally fine , he could write the same way with both hands & played sports with either hands .
When I was in preschool I remember learning to write the first time. They told me how to hold the marker and I asked them what hand do I use. They said just whatever feels comfortable but both hands felt the same so I just followed suit with the rest of the class and started with my right hand. I can do most fine motor skills with my right hand, but I always played sports with my left or was able to switch. I can throw pretty equally with both hands and kicking is equal between feet
@@joshuamirabal3617 thats called mixed-handedness and it's pretty rare, I have the same thing. Apparently one of the causes is abnormal neuroanatomical structure, I think it's especially with the size of the corpus callosum which is this connecting part of the two hemispheres. In ambidextrous and mixed-handed people there is an unusual amount of communication between the two sides of the brain. I don't know about you, but I've always thought my brain seemed to work differently than others
🎯 Key Takeaways for quick navigation: 00:00 🚀 *The video explores a scenario with a giant circuit to question how long it takes for a light bulb to light up when a switch is closed.* 01:29 🔄 *Unlike a battery, electricity in the grid is in the form of alternating current (AC), where electrons wiggle back and forth without a net movement. The traditional explanation involving continuous conducting wires and electron flow is challenged.* 03:26 🔍 *James Clerk Maxwell's breakthrough in the 1860s revealed that light consists of oscillating electric and magnetic fields. John Henry Poynting's 1883 discovery of the Poynting vector showed how energy flows through these fields, challenging conventional views about electrons carrying energy.* 06:20 🌐 *In a simple circuit with a battery and a light bulb, the energy flow is explained by the Poynting vector, showcasing that it's the electric and magnetic fields, not the electrons, that carry energy.* 08:51 ⚡ *The video emphasizes that energy flux only goes one way, from the battery to the bulb, even though electrons move both ways. It highlights the misconception that people often think they're buying or pumping electrons.* 09:49 🔄 *The analysis of alternating current (AC) is explained, demonstrating that even though the direction of current reverses, the Poynting vector consistently points from the source to the bulb.* 11:47 🌐 *The historical failure of the first Trans-Atlantic cable in 1858 due to distorted signals revealed the importance of understanding energy transmission through electromagnetic fields, not just the flow of electrons in conductors.* 12:17 ⚡ *The answer to the initial scenario is provided: the light bulb turns on almost instantaneously, and the limiting factor is the propagation of electric and magnetic fields through space, not the movement of electrons in the wires.* 13:50 🤖 *Caséta by Lutron, the video sponsor, is introduced, offering smart lighting control that allows users to turn lights on/off with a phone, Alexa, or Google Assistant, enhancing everyday experiences with a deeper understanding of electrical energy flow.* Made with HARPA AI
They just made a ten minute video to answer the question of why most humans are right handed, and the answer they came up with is... "Well, we just don't know". Gee thanks, PBS.
@@SnowyButterfly1 source? Because Humans and bugs are both in animalia and fungi are in fungi which is separate a separate kingdom (I think it is kingdom)
It's all about hips for me. I'm right-handed and play many sports but I always main whichever hand is needed for my left foot to be forward such that power generation is a counter-clockwise hip rotation. E.g. baseball: right-handed, disc golf: left handed. (Same full lower-body and core motion, just different hand). I think the eyes are also extremely important. If you have far better sight in one eye than the other, you're a lot more likely to use whatever main hand that goes along with that eye (e.g. shooting a rifle).
My best friend growing up was a very rare “true ambidextrous” person. He was perfectly ambidextrous even at a young age, with full 100% even control with both hands and he did tons of studies growing up about it and showed that his brain was symmetrical, to an odd degree even beyond the average ambi person. He would often do demonstrations writing with both hands, but also capable of writing backwards with one of them, at the same time! It was weird and kinda cool. Pretty neat. I always liked people with interesting quirks, like my exgf with an odd heterochromia. People are awesome!
not sure what you mean by his brain beeing symmetrical, if it was equal on both sides he would be missing a brain functions since some are exclusive to the left or right side
I used to run a roofing crew. I would purposely hire a lefty because when coordinated with a righty things went quicker and smoother. Things like cutting off extra shingles would be done by the person more comfortable at that particular end of the roof. Sounds weird, but it helped.
Hey I'm a lefty roofer. I can see it being a small advantage. When I'm laying a shingle we are laying them out left to right if possible. I butt up the seam, use my right hand to line up the rain groove on the outer edge, then nail left to right. I think my left hand, being my gun hand, has a little less work to do than a righty doing the same thing.
Football managers are now picking a left legged for left center defender and right legged for right center defenders because the lefty faces a right legged attacker the right legged faces a left legged attacker.
I have a spearhead from a Zulu warrior. I was going through the channels one day. On passing through had seen a show on spear hunters in the Serengeti. So I started watching the show. Two hunters were hunting a gazelle I believe. To tire the gazelle one hunter with a spear stayed stationary, spear in hand above his right shoulder. The guy, circling for the gazelle around on the right same position with the spear. Their left arm was folded in near their chest. To protect vital organs and their heart. In case the gazelle's horn strikes in an attack. So, right arm out stretched gives greater distance away from heart. To completely protect your heart with your right arm means you have to cross your arm over more, slightly limiting your left arm and torso in certain situations. Also in the way they hunted noticed they also read the hunting seen left to right as the gazelle was mainly off to the left of them. So gives the chance to more easily protect the heart and provide a killing strike.
@@atomictraveller My brother and I are both lefties. However, we, like most lefties, do fine motor functions function like writing and catching a ball with the left but our right arm is stronger so we bat like a righty. This would fit into this hypothesis well since it means better protection on the left without losing the power of the right arm for throwing the spear! You could describe 80% of lefties as left handed, right armed. And left footed.
@@Christobanistan that’s very interesting. I eat, throw, bat and shoot with my left. I kick, punch, play the drums, and play the guitar with my right. But still struggle with can openers, brooms, etc. So I’d say I’m left handed, right armed, and right footed.
From my experience volunteering at a rescue, parrots are usually left-footed. They grab and manipulate things much like a hand, and they do tend to prefer one foot over the other (more often their left foot). Just thought I'd mention it, they too are bipedal like us and the kangaroo and since they're birds, they have a completely different evolutionary history, yet they also prefer one side over the other. It definitely suggests bipedalism has something to do with it.
Also to be noted, kangaroos lack a corpus callosum, the part in our brains that communicates between left and right hemispheres. So essentially, if the kangaroo does something with its left hand then the only way the right hemisphere comes to know about it is through external stimuli.
Actually recent studies have shown that Marsupials have nerve connections between left and right side of their brains it's just simple nerves and nothing complex like the corpus callosum.
@@jonathancummings6400 Funnily enough, some parts of the marsupial brain type would be way more effective than ours, if we could swap them... evolution be wack.
My son was born prematurely, and we were told that the earlier a child is born, the more likely they will become left handed. We noticed pretty early that he was going to be a lefty.
There's also a myth that if you breastfeed the baby and you give it the left breast first it's gonna be a lefty and if you give it the right one it will be a righty lol, sounds like BS but who knows, I mean my mom told me she breastfed me with the left one first when I was a baby to test it out and I'm a lefty
I started out completely ambidextrous, either hand could perform any task with equal facility. As I've aged my hands have specialized where most strength based actions are with my right hand, and fine motor skill actions are with the left. I would be interested to have my brain scanned and see what parts light up during different actions.
My sister was born a lefty. But when she started writing, she wrote upside and backwards. That is what she put on paper was not only mirror writing, but also inverted vertically. It scared me dad so much, he taught her to write right handed. To this day, she writes mostly right handed, but does most other things left handed. Fortunately it did cause her to stutter like I have heard it can when someone is forced to change.
The same thing happened to me. I am mostly left-handed but my parents forced me to write with the right hand and that caused me some issues... But still my left hand is more dominant compared to the left one.... And i only use my right hand for writing
As an operating room nurse with over 22 years experience, I have found it not uncommon for everyone in the room to be left handed… on a major surgery, for example, 14 of the 19 people in the room were left handed. As a lefty, we do tend to notice one another just because we know the struggle. Every single OR I have worked in has had at least 25% of the staff being left handed. Curious about the correlation there!
I'm left handed, and you are correct about leftys noticing other leftys. I tend to notice other leftys without even trying to look for it. a couple of (examples) are 1: I noticed that former President Obama was left handed before most people did, before he became President. and 2: is and this one was more tricky, it's about one of my favorite guitarists Dave Hill. I didn't notice it emmediatly because he plays the guitar right handed. but then I seen some footage of him at an autograph signing, and I emmediatly noticed that he's left handed. what is really funny is I also Play the guitar right handed. I usually can spot it easiest when a person is using a pen or pencil. but I can also spot it other ways to, so I definitely agree with you about leftys noticing other leftys.
@@rickycolston7861 I can't say in regards to that, but I do know left handed people use the right side of their brain, hence the old saying. "left handed folks are in their right mind".
No worries I'm lefty aswell but their r certain things I can do with both hands like write but other things like cutting with scissors I'm not so good at. Maybe even though you have adhd you may better at somethin you haven't configured to such as thinking in different ways or seeing things from different perspectives
Hey a lefty with ADHD here too! Sorta cancels out, doesn't it :( Also, there are studies of lefties have higher probability of having ADHD than righties. Interesting to look up!
As a righty with ADHD, I feel like I have much greater coordination than most people, because a grew up watching/feeling every muscle move, twitch, flex constantly. You still can't keep a ball out of my hands, but keeping my concentration level up was difficult in competition, and memory/social skills are crap.
My grandmother was born left-handed. However, she lived in a time period where left-handedness was seen as “evil”, and so her teachers and parents (along with other adults in her life) basically forced her to do certain things (like eating, drinking, writing, etc) right-handed. To this day, she uses her right hand for those things and her (at one point) dominant left-hand for everything else
When we visited Australia I pointed out to my wife that the sink was draining “backwards” (counterclockwise)... she looked at me like, “did we really travel 15+ hours on a plane to look at how the water drains?”
@TylerFortierPhotography go a little further and you realize this is how translation works, and most translators are literally making things up on the fly.
Not so long ago, kids used to get hit by the teachers in school for writing their left hand to write, the dad of one of my friends even ended up in the ER because the teacher literally split his head open with a ruler for it. While most people are right handed, I do wonder how many more people would be left handed if it hadn't quite literally been beaten out of kids for so long.
A five minute google search would have negated your need to accuse someone of lying. A standard wooden ruler would do that, and many old rulers had a metal strip that could be sharp. In Texas in the early 2000s being hit with a wooden paddle was still a standard punishment at my public school, although parents had to sign to agree to it. Idk what the rule is now.
I used to think it was because left handedness was thought of as witchcraft in the middle ages, and therefore bred out of the species. However, after watching this video, it is more likely that the tools lasted lifetimes and became predominantly right handed, forcing the adaptation of the left hemisphere, or be eradicated.
When I was young, there was a trend in Russian school system to "switch" lefties to write with the right hand. It was explained that usually lefties have bad posture when they are writing, and all that stuff. So I was "switched" from my dominant left hand to right, but it only made me truly ambidexterous, because, well, you can't just switch your brain like that. I am glad that now this trend is long gone and that my children would not be forced to become ambidexterous. But I should admit that this "switch" made my way around scissors much, much easier.
My dad and his brother were forced to switch from left handedness to right handedness (due to religious, superstitious reasons) and now neither of them can write with their left hands 😢
In United States in the 70's - I do remember some teachers would have left handers go to special writing classes during school to switch to right handed.But by middle school I recall teachers accommodating left handers. I'm glad they stopped forcing the switch..
It is just how you are shown how to do something. I taught my son and daughter to play ice hockey and baseball both left and right handed. As little kids they picked it up with ease.
When I was a child I was left handed. Then in my first year of kindergarten I tripped on my shoe laces and broke my left arm. My teacher the taught me to use my right hand for everything, 30 years later I am still right handed. I'd be interested in seeing what my brain looks like in a scan as a "right brained" right hander
I had a similar situation, being left handed until I was 2 and then suffering a wrist fracture and switching arms, but I re-taught myself how to write, draw etc. with my left hand when I was about 7. I still describe myself as right hand dominant though because life is just built for right handedness, especially in school, so ultimately I can't write as quickly with my left and my grip strength is lesser (although my arm strength is greater?). If you haven't re-taught yourself to use your left hand for everything it would be worth a try!
Most of my family members are either lefties or ambidextrous. We have always been very careful of who we sit next to during gatherings like Christmas and birthdays, so that we don't constantly bump into each others when eating. We have a lefties and a righties side of the table. I only very realized that it was an abnormal thing to think of. I went out with a group of friends and asked if we should organize the table according to hand preferences. They were all right handed lol
What if the real reason for right handedness is actually that simple? Because otherwise we would constantly bump into each other so when working in groups it made sense for everyone to use the same hand
Yep I have that issue. I try to sit on the left whereby no one sits on that side otherwise we'd be bumping elbows while eating! One of my brothers is also left-handed though thus we often sit next to one another. Our Father was also left-handed.
The Kerrs of Castle Kerr in Ireland were almost all left-handed, so much so that the spiral staircases in the castle have a reverse twist, to favour defending left-handers.
@@KaitainCPS Fighting up stairs is a fair bit harder than defending down them. If you've ever been up any of these old spiral staircases you'll know they're a form of defense of their own, so steep.
Lol my friend’s a descendant of that clan and he’s a righty, but I’m a lefty haha. That’s kind of funny to learn about them. I’ll have to tell him next time I run into him at the bar 👍
I’m a lefty and I thank my grandmother for that. When I was a baby I used to always grab my spoon to eat with my left hand and my mom would always try to correct me and make me use my right hand. My grandmother just let me do what felt natural to me. So I’m a dominant lefty but I am probably ambidextrous.. The only thing I hate doing left handed is writing in a notebook or with ink because your hand gets covered in ink dragging your hand thru the wet ink as you write.
@@lilchermerk878 Yeah. We had to write with a ink pen in school, it was hell lol. I always came home with a little bit of ink on my left hand but the teachers didnt allowed me to write with a ball pen for years :/
This used to happen to me all the time but I adjusted by turning my pages so I would basically write up and down (instead of side to side) but my brain would flip it right side up. Whenever my new teachers saw this they always acted so surprised that it works.
In the 70’s growing up, my grandmother would tie my sister’s left arm down so she couldn’t use it, because she believed being a lefty was a thing of the devil.
Wow, I'm amazed that still happened so recently! They used the same technique on my grandfather when he was a kid to force him to use his right hand, at least for writing,. That would have been just before WWI so, more than 100 years ago.
@@nessunodorme3888 my grams lived to be 102 and died in 2016 so that would have been close to the same generation. She was very old school, lived in the same house her whole life, had a basement full of home canned food for emergency, raised her own cattle for meat and milk. She was quite amazing ! 🤍
@@Nov1cegg Wow! I never imagined anyone still did this that recently. Out of curiosity, was this in a remote or rural type place? Sometimes ignorance persists in places like that.
Another leftie living in a right handed world. My older brother taught me to swing a basball bat - right handed of course, so I'm a bit a switch hitter, though I actually prefer to hit (and golf) right handed. Still swing tennis and pingpong rackets with my left hand. Being a leftie also helped me when learning the piano... my left hand didn't struggle with bass lines, and my right hand dexerity was already well developed so the instrument just really brought the skill level up on both sides.
Some commenters have pointed out that we say "after our lineage split with chimpanzees," "members of our lineage after the split with chimpanzees," and "after our split from chimpanzees" at various points in this episode. Just to clear things up, humans and our extinct relatives share a common ancestor with chimpanzees and their extinct relatives. After our lineage split from this common ancestor, we call our group "hominins." Living chimpanzees also have their own separate evolutionary history since that shared common ancestor.
First
“Split with chimpanzees” is not the same as “split from chimpanzees”. Indeed we “split with chimpanzees” not split from them.
Could the culprit to hand dominance could be tied to agriculture development along with g protiens from early generation of gmo growth hormones which caused intellectual growth to the broca after its cycle thru the gaba system.
@darknightoftroy Listen this is science and they’re professionals who should get it right.
@@kayzeaza If you're dumb enough to get confused with "Split From Them," and "Split With Them," maybe go back to English class.............. And if you wanna go into it, we did split "FROM THEM," notice how they're still around and the in-betweens aren't. Please make an argument someone older than 5 should make.
I was actually born left handed But I had a stroke when I was very young which paralyzed the left side of my body meaning I had to grow up right handed instead. My favorite joke is “ I’m ambidextrous, I just can’t show you right now”
good job champ, you have pulled the big brain move with half of your brain
😂😂😂
...so...when can you show me? 🤔
My sister had a stroke 14 years ago. She was right-handed but is now a leftie because her right side doesn't work. She also uses her teeth a Lot from getting dressed to opening things to holding things.
That's an amazing story.
I appreciate that some of our best old evidence of this is from people basically punching themselves in the face on accident.
yes thanks to those neanderthals damaging their teeth we have evidence. But rip neanderthal teeth
Makes me feel better about dropping my phone on my face as I watch TH-cam.
🤣🤣🤣
Punching themselves in the face by accident... with a rock... in the teeth.
*by
There was a family I knew growing up where a lefty man had married a lefty woman. And they had customized their house to accommodate this: the door hinges, doorknob turns, the refrigerator door, the drawstrings for the blinds etc. Spending time there felt like living in an Escher painting.
I need to visit that house sometime, sounds like a lefties dream
huh? ive lived in a right handed house this ENTIRE TIME LMAAOOO
As a lefty, I would like to visit them some time lol
All those are available at The Leftorium
Then they had a righty child and yeeted the baby
As a left handed person, I think living in a right handed world forces you to be a lot more ambidextrous than the opposite for right handed people.
Very true
I definitely agree, I wonder if thats partly why we have less brain lateralization?
So does mechanical assembly. I’d be surprised if your non-dominant hand is as agile and strong as mine.
Yeah it’s everywhere. Just today I was thinking about this while I was messing with an automatic type knife. It’d come out into a left handed person’s palm.
Because a lot of the time we get taught by righties, so you either learn that hand or figure out how to do it with your left.
Took a fencing course in college, was one of the best in the class. Finally went up against the other lefty. We engaged and backed off perplexed. Nothing worked the way it was supposed to.
I’m also a lefty fencer. I’ve had the same problem. My class rival and I are always trying to one-up each other, but fencer each other is annoying because we’re both lefties.
Hahahha
Yep, I'm a lefty swordsman too (larp rather than fencing), can confirm I've had the same experience. Running into another lefty threw me off almost as badly as it usually throws righties.
It’s like playing with inverted controls
NOT in japanese fencing styles- our Law " there are No Lefthanded swordspeople" --- we play Right. worth the effort, and our advantages as lefthanders are more discreet . not to mention the right side and The Brain benefit lots .
I used to fence competitively, and found that most fencers have a very difficult time fighting a Leftie. It was a distinct advantage in many bouts.
I came to say that LoI . It's actually worse if you're left handed (like me) Think about it. All the fencers in my class got to fence TWO lefties. My comrade and I only fenced ONE!
@@Songbirdstress I suffered the same way, being a left handers, but in Table Tennis. Luckily, these days I get to play against many left handers.
Same as in boxing.The say its difficult to fight southpaws because they mostly spar with right-handed people and are not used to it
Same! But where I was, everybody in the region had already fenced many lefties so in both epee and sabre I didn't have as much of an advantage as I wanted :D
🖐 high fives for lefties
Footnote: left-handedness had survival value in trench warfare of WWI - soldiers throwing improvised explosives in the dark with their left hand were less likely to be picked off by snipers (who would routinely shoot to the wrong side of the glowing fuse).
@Alpha Omega what?
Sinister
Thanks
That’s interesting, can you provide a link or article to confirm this? The US taught lefties to hold grenades upside down so what you’re saying appears to contradict this which is why I was hoping you’d have some evidence to help clarify the discrepancy in information available
@@TheBreechie My knowledge is anecdotal. Australian soldiers, including my grandfather, landed on Gallipoli in 1915 and had little or nothing by way of ‘grenades’ supplied to them. Under constant fire from Turkish snipers, they would fill their biscuit tins with gunpowder, add an improvised wick (which would glow fiercely in the dark) and emerge briefly from their trenches to throw the resulting bomb.The Turkish snipers would routinely aim to the right of the glow - and, if the ‘grenadier’ were a lefty, the shot would miss. Hope that helps.
About 40 years ago I worked at a company that made woodgrain trim for Jeep station wagons. It was bent by hand . I noticed that if a lefthanded person learned to make a part on one side of the car he could immediately make the same part for the other side. But a right handed person had to learn that side the same way as any other part.
A case of lefties having to adapt to a right-handed world would be my guess for why that would be the case.
Also, because they use both sides of their brain more and slightly differently (as covered in the video) this might result in being able to develop spacial thinking and skills better (e.g. mirroring an object in your head)
I would not have expected this. Great info
one of my teachers used to call me and other lefties a "silver surfer" because whenever we wrote an essay our hand would be covered in graphite
Ah, yes writer’s silver hand
Ah lefties curse. Hand: smudged. Paper: dirty
Apparently this is the real reason for Leonardo's "mirror writing" - it let him write in a direction so that he wouldn't get ink on his hand. There were even books in the 15th century aimed at lefties explaining how to do it.
damn i hated my draw teacher saying i wasnt clean enought and getting failed in class.....
@@nathanielb3510 now i know that writing backwards is on par with a proto helicopter and proto tank
Left handed advantage in fencing is actually insane. It's not about surprise, it's about having to invert all your well trained motions when fighting a left-handed person.
I’m a lefty,took fencing in school,stuck everyone within seconds.the instructor brought in a guy that was on the fencing team,only time I got beat.
@@darensylvara7690 when I was fencing, the only bouts that felt strange were lefty vs lefty ones since I trained so much against righties
Same with boxing!
@@darensylvara7690 Should have used pocket sand.
Yes it is difficult fighting someone left-handed, including when fencing.
Being a right handed judo player, grappling with a lefty always feels awkward whereas for the lefty it's business as usual. What's really funny is when you see a really good lefty finally come up against another lefty, because they suddenly look like a beginner again, with neither player knowing how to actually set up their throws because they so rarely encounter one another.
I'm so glad that my usually undesirable trait gives me an advantage in literally every martial art form ever.
Came here to comment that, I did judo and was trained left handed as it came easier to me (even thought I write right handed). I also boxed left handed
Since when does one "play" judo? Thought it was a martial art.
@@einundsiebenziger5488 I never "played" judo (I always said "I do judo") but it is seen as a sport fairly often :)
I am a lefty too
And I did Judo(did not anymore bc of Corona)
And I think I played just like a right handed would play🤷.
And I never had that problem😅
You might be interested in how handedness has affected architecture. You will find that in medieval castles and other fortresses that have stairways , those stairways hug the walls such that upon ascending the walls are invariably on the right hand side. This is because it inhibits the movements of right-handed invading swordsmen, giving the (also right handed) defender above an advantage with greater room to swing his sword. Now, a lefty attacking would nullify a lot of that advantage, but the defender would still have the height & weight advantage of striking downwards.
Ferniehirst Castle in Scotland has a left handed design. Sir Andrew Kerr was left-handed and trained his men to fight left-handed.
@@ukcroupier That says a lot about wealth and is entirely unsurprising that everyone had to learn to use a sword in their offhand so that one guy wouldn't have to.
In single combat shields become much less effective too. Sure you can still put a shield in front of you but if my sword and your sword are on the same side I can attack from an angle you can't defend as easily from, and while the other way around is also true a leftie would have fought more righties than a righty has fought lefties
There’s a clan in Scotland who built their castle stairs and trained the soliders to fight left handed so they have advantage for this
@@ukcroupierdamn bet me to it haha
Knew a girl in High School who could write cursive with either hand neatly. She could also write cursive with either hand as a mirror image neatly. It was fascinating.
My 12 year old uses both hands well depending on what she’s doing. She will write with her left then get tired and switch to the right. I have 2 other kids. One is strictly right handed and the other is strictly left handed. My 12 year old will use whatever hand is easiest due to which sibling she happens to sit next to. We have quite a bit of lefties in our family.
I often challenge people to tell me which hand I signed my name with.
You have a 50/50 chance... to get it wrong
I am literally listed as ambidextrous by the military/va
I can throw a football/baseball with both hands and shoot basketball.
While I do have preferences in many tasks, I can always perform said tasks with the opposing hand with ease.
That does exclude specific training... (like baseball) I can throw a ball ~65MPH Left Handed, but as a kid I trained to throw right handed so I can throw 85MPH right handed...
(I only had a glove that fit my left hand since we were VERY poor and I used hand me down equipment. My twin sister would take the glove off to throw left handed while I found that to be cumbersome)
I can write CURSIVE with my foot
Goals
When I broke my left hand I got really good at drawing and writing with my right hand.
I was the only left handed kid in my 1st grade class. The other kids wondered why I always had lead pencil stains on my hand. Right handers don’t know our struggle.
Or ink stains
"Right handers don’t know our struggle."
I know the feeling. It is a burden we have to bear for being superior.
I guess it depends on the language, for arabic the right handers would struggle
im right handed but i draw a lot so when i used to use pencils for everything, my hand would always be shiny and silver. it causes a lot of smudging on my art. that mist be so annoying while writing a paper especially if you need it to look clean
Pretty simple just be dyslexic
have we considered that the less-lateralized brains in lefties could be a result of lefties being forced to do more tasks with their right hands, since the world as we know it and the majority of the tools we make are very biased to right-handedness these days? like having to navigate keyboards, guitars, door handles, etc. (all put the important things on the right side), forcing these people to adapt more significantly than a right-handed person would. not to mention cultures where your left hand is the one you don't eat or touch with.
I agree with that completely. I have been using more variety of tools lately and can tell when a tool is specifically right handed. Skill saws for example
I'm VERY left handed but don't really encounter problems in the modern world due to that. As a kid, there weren't any real left handed scissors, but that's it.
This is absolutely true. Left handed people need to constantly learn how to use tools and activities in the opposite way they were designed.
I've always thought it helps with things like problem solving
@@pello7048 i agree but when u say something a lot of right handed people cant see what u mean just looking at it sometimes cause theyre evaluating from a different angle. Me and my boss have got this down pretty good. I do the lefty stuff. He does the righty
@@pello7048 As a middle-aged lefty, I never "had" to learn how to use tools the "right" way. Fortunately I was not in the generation where lefty kids were forced to write with their right hands, which actually has been proven to be psychologically damaging. Right handed ladles in the kitchen, still used my left hand - probably enhanced my coordination to pour precisely from a less pointed spout. Right handed scissors only available in school, cool, I make them work with my left. Right handed baseball mits only available, figured out how to make it work. It wasn't that tragic. Call it forced creativity, but I'm sure there was a benefit to our 10% of the population.
Funny story: i worked with a guy who applied for a grant from an organization that supports and recognizes left-handed people...he wrote out this multi-page essay about how he wasn't even left-handed and essentially just wrote this essay out of sheer boredome...
they ended up giving him the grant because....he literally was the only person to submit an essay for this grant!
Does this grant still exist, because I could really use it
@@ashley-anne7043 me too
still exist?
where is the funny part? you forgot the funny part...
@@504BlueDevil lol where's the part where I care?
Being left handed and living in a right handed tool world, has given me almost ambidextrous nature.
I can pitch a softball, bowl, and anything else done underhanded with either hand. I play drums open handed on a right hand set, which is 100 times easier than crossing your right hand to play the hi hat. I play guitar equally bad left or right handed.
Overall I would rather be left handed than right handed, except when a fountain pen is involved.
I’m generally considered a lefty because I write left handed, and mostly use silverware and cutlery as a lefty, however, I can pretty easily switch hands for eating, unless I’m using chopsticks, which I can only do left-handed. However the reality is much less clear. Ive found that things requiring strength or fine arm control, I tend to do right handed. Examples, bowling, throwing, tennis, volleyball serve, golf, etc. Things requiring fine finger control like writing and chopsticks, I do exclusively left handed. While I can cut things with a knife in my rot hand, I don’t have the same level of control, so use a knife almost exclusively left handed. I use right-handed scissors, exclusively, with my left hand.
But i can switch hit as a batter, more power right handed, more accuracy left handed, probably because I’m right eye dominant. I shoot pool with either, started left, have been switching to right because of eye dominance. I shoot rifles and shotguns right handed, but can easily user either hand for a handgun. I kick a ball right footed, but can play soccer and control the ball well with either foot.
I use a mouse of trackpad with my right hand, totally suck at using them left handed.
I can write on a whiteboard/chalkboard almost equally well (or poorly) wither either hand, as that’s arm and wrist control, not finger control.
Also, I juggle, which has no particular hand dominance.
Tool use varies, generally following the same strength/control factors outlined above. Hammer right, most power tools are either hand with a tendency to use them left most of the time, but ability to switch as needed. Hand saws vary, usually left for fine control, right or switch for strength.
Basically, a mish-mash that mostly follows the patterns I mentioned in the first paragraph, with a few things are exclusively left or right.
Listen, I know right-handers are inferior but you don't have to call them tools. 😉😂
For me even as I'm forced to live my whole life as righty it's harder for me to handle delicate task with my right hand. e.g drawing, putting threads on a needle, or using a chopstick.
Basically I'm now ambidextrous with caveat of my right hand being pretty clumsy.. which actually a huge thing for me since I always thought myself as suck at drawing or handicraft for over 20 years before I discover that it's okay to use your left hand for stuff.
The biggest tell for me that made me realize that I'm left handed is actually from reflex. whenever I'm about to do or take something.. Even after years of being righty, my left hand always moved first by reflex.. it's feels more natural to pick up dishes or opening the door with my left hand.
@@JeSt4m I hate hearing about people being forced to use their right hand. A teacher tried that with my older brother, Dad was also a lefty and was having none of that crap. My 3rd grade teacher allowed my to use my left hand, but insisted I was placing my paper in the wrong position when learning handwriting…again, Dad stepped in and had a word with her telling her in no uncertain terms I could position the paper in any that worked for me when writing.
Wow I've been searching through the comments for who asked.
It had taken me 18 years to realise that everything around me was designed for right handed people. I always wondered why I sucked at pc gaming. It wasn’t until I was 18 and during my first ever exam that I saw someone asking for a left handed chair( there was a table attached to the chairs) then I asked for one and I was blown away by how much since it made compared to the right handed one. I took it for granted that my hand movements sucked but now I know why.
Sucking at PC gaming is a blessing. Perhaps this way you wasted less hours of your life on PC gaming and did something more useful?
@@Mr.Monta77 unfortunately I wasted it on Console gaming instead. But thankfully I left that behind me after enrolling in college.
@@mlooky1221 I'm glad to hear that. Congratulations on growing up.
I’m left handed, I recall my parents buying me some left handed scissors as a child, and I still have them 20 years later! But, I have no idea what a left handed chair is? Can you elaborate?
@@vichentez some chairs (in a school for example) have a built in little desk, that comes out of the right side of the back of the chair. the left handed chair would have it on the left, since a left handed person would have to write with their left hand
Eons: "Turns out Neanderthals have been using their teeth as a 3rd hand for quite a while."
Me, using my teeth to hold something while opening a door: "Oh, you don't say."
My exact thought...when steaming a dress, I hold the steamer in my right hand, and my left hand and teeth to hold the dress taut to get the most effective straightening.
Considering that quadrupeds don't have as many chances to use their forelimbs to hold things one might might say the mouth is the original hand.
Imagine how handy you'd be if humans still had tails.
I use my teeth like a third hand a lot.
@@duybear4023 That would only be possible if apes never split from monkeys because humans are apes.
King Solomon had all his left-handed fighters in one division. I can imagine how that can be advantageous if the enemy is facing waves of attacks, and suddenly one wave are all left-handed.
Also, the unit would not have swords flying willy nilly. An organized unit would be much less dangerous to itself...
If somebody doesn’t say “oh hey your left-handed, didn’t know that” are you even left-handed ?
Oh hey, my left handed... 🤔
Oh so many times, haha
Damn this is so real
Felt this
Im actually an advocate of using the left to write and the right to shave, comb hair and brush theeth but I cut with the left while cooking and with the right while eating.
The non dominant hand is called for certain tasks and training to use it is beneficial to both hemispheres.
Horses are “handed”, going more easily one direction than the other. We spend a lot of time training them to be ambidextrous.
Horses have hands 🤯
I put “handed” in quotes to align with the article and yes, we use the word “hand” because we go clockwise or the “right hand” because I use my right hand to turn in that direction. Most horse are “stiff” on the “ right hand” and “hollow” to the “left hand”, meaning they take too much pressure on one side and not enough on the other. Horses also tend to prefer one canter “lead” to the other.
Yes. Horses prefer one lead over another when centering and it is easier for them to corner in one direction than the other
Pic confirms your qualifications!
So do dogs, cats, monkeys, even fish. What they were saying about no other animal not having a preferred side is flat out wrong. It’s simply evolutionary for complex organisms because it helps with short cuts in the brain.
Right-handed people will never know the pain of having to write left-to-right with a number 2 pencil all throughout school and constantly having to scrub the graphite off your hand because of how it smudges as it moves over what you just wrote.
As a righty, I actually know the pain quite well xD
We had to use cartridge pens and ink at school. Blue hand and shirt cuffs.
Smudges still happen if I write a card on the wrong kind of material. Also looks a little odd with that left hand bent at a right angle to the forearm. My grandfather wrote with the top of the letters slanted to the left.
@@RetropUk Yes, I recall it with horror. And then one was given a failing grade in writing as an extra incentive to doubt oneself.
artists: am i a joke to you?
I’m friends with a pair of twins, one right and one left handed. This is called mirroring and occurs when the developing egg splits after a certain time. Identical twins (both right handed)divide before then. I wondered if it’s possible that some lefties could be the remaining twin after an early foetal loss. Often embryos lost very early on are not even noticed as more pregnancies end spontaneously at such an early stage. Just a little pondering of mine.
I'm a right-handed identical twin, with a left-handed twin brother.
Same as your friends.
@@surfclimbcycle Take photos of you both and then flip them so you look more alike.
im a left handed with a right handed twin as well.
@@18something wondering please - R U identical twins?
I'm a left handed only child and this is something I've always pondered too.
Since childhood I've had a Quaker Parrot that is decidedly left handed (footed? clawed?). If you hand her anything like a Cheerio to eat, she will always grab it with her left foot. Likewise she will always step onto your finger left leg first, and step off of it in the same manner. When she was about 20 years old, she fell from a perch and broke her left leg in 3 places. The vet said they didn't have much hope for her surviving the injury, but we gave her constant care and made sure her leg was always well bandaged and dry. She made a full recovery and regained full use of her left leg which she still uses almost exclusively for any task. I've never had another animal with a distinct preference for one side over the other but she was determined, even with a serious injury to continue using her dominant leg and the vet believes that it was her constant use of the leg after the bandages came off that allowed it to regain all of its strength.
My parents only noticed that their dog was left-pawed after having him for 5 years… If you ask him to “shake hands”, no matter which paw you put your hand in front of, he will only shake with his left paw.
Vets are typically extremely closed minded when it comes to animal recovery.
I have a quaker parrot too and she’s also left hand dominant, stepping up, eating etc. Interesting! Glad she’s doing well now after injury
What a beautiful story. 💖
@@KCUFyoufordoxingme probably because their patients are more stubborn.
My daughter is left handed and self taught herself to play the guitar. When we finally took her to get professional lessons her teacher was shocked that not only did she play left handed but she also perfectly played her chords upside down. He said he, as a professional should correct (not playing left handed) the upside down playing but it intrigued and fascinated him so much that he allowed her to continue and it actually was her greatest strength
watch sum Elizabeth Cotten, she played a very particular style for similar reasons, very inspiring
I have a friend who also plays that way. It baffled me at first, then I tried imitating him but failed. I always wonder why my dominant right hand seems to be worse with chords than my left hand when I first learned the guitar. Strumming with my left hand also doesn't work lol
My son did this as well.
@@djm7494 that’s awesome
@@arifb222 I play a little bit of guitar for fun ,right handed ,and have always wondered if I would have started left handed what the results would have been .Had an old guitar player tell me once the magic is in the picking hand and hopefully your fretting hand can keep up.
Being a Leftie is fine for me until I went to school where their armchairs only have a right arm rest.
There's a special place in hell for the people who design those types of chairs
@@jacob_90s LOL. well i agree, those chairs are such a pain.
Idk bout you guys but i got used to those
@@lunarcrusaderArt yeah there's no choice but to deal will it. You're a Champ!
If you're lucky, then there's a left-handed seat on the aisle. It's like being treated as disabled.
A thing that has always been noteworthy for me: when I was really young (4 or so) my left handed aunt taught me to knit and crotchet using my left hand. I am otherwise right handed, but on both sides left handed-ness is very common. She grew up in a time that forced her to learn to write with her right hand and later remarked that she didn’t even realize she was teaching me on one hand vs the other.
I still can’t make my brain knit or crochet using my right hand as a dominant hand. I think it’s because I was taught so young that the muscle memory is just engrained that for these two crafts it’s a left handed as dominant hand task.
A friend broke her arm when we were in second grade. I started practicing writing my name with my left in case I ever needed to sign a paycheck left handed. It was for naught 'cause I broke my left arm in my 40s
When I broke my dominant arm, I startled nurses when I was able to competently utilize a fork in my non- dominant hand. But I was taught to hold my fork in the non-dominant hand while cutting with the dominant, so not really a big issue, since I had always conveyed food to my mouth with my non-dominant hand.
I used to go bowling with my friends once a week. I suck at bowling, but somehow managed to bowl a turkey one time when I broke my right hand and had to bowl with my left hand.
Big Oof
You used a quotation mark. I was trying to understand the quote when I found no closing quotation mark, and then I finally realized the quotation mark came right before a word that was abbreviated, and figured out it was supposed to be the word: 'cause. I wish stuff like this happened to me less... I take things too literally.
you broke your left arm because it's natural to use it for defensive measures... because you're a righty.
"70% to 95% of us to be exact"... i chuckled
i would like to buy exactly 2-5 burgers please
good for you
Huh?
@@501thtrooper4 "to be exact" "70-95%" its funny.
@@Desklamp1234 so you owe us 3 burgers thank you
”Kangaroos are mostly lefthanded”, that's why they drive on the left side of the road.
Common misconception from those who live in the 60% of the world that drives on the wrong side of the road 😉
Driving on the left of the road is the righthanded approach... At least, it's the righthanded way with the standard configuration of car controls. Naturally, it is safer to do the more complicated, safety-critical action (steering) with your dominant hand, and do the easy muscle-memory activity (changing gears - there's only a limited number of points you need to move the stick to) with your non-dominant hand.
Take manual gearshifts out of the equation and it comes town to preference, which generally comes from what you're used to. So if you have spent your life in a left-hand drive country, then you'll probably think "driving from the left of the car is the natural way". But if you have spent your life in a right-hand drive country, driving from the right of the car feels more natural.
@@donkmeister Disagree. Steering is the easy part. Trying to figure out why Pandora won't sync via Bluetooth, again, is the hard part. ;)
@@donkmeister I dunno. I'm right-handed, and I'd prefer to have half a car between my valuable right hand and a drunk driver. Better to have the left side exposed, it's more expendable ;)
@@diazinth So if you get half smashed in a crash, you'll be all right?
@@mal2ksc the odds for recovery of my favourite parts are better than fully smashed.
It works like COVID: the more you stack the odds in your favor, the better your outcome will be over time :)
Some of us reached perfection earlier than others and remained left-handed.
Preach, fellow southpaw!
Nah you just learned use the left side of your brain when you use your left hand everyone else uses the left side only for right side body interactions. The right is completely useless at drawing because it's incapable of determining distance, space or time. It can describe what objects are and how they interact but fails miserably at outlining them. That's why right handed people never become ambidextrous or if they do are poor at best at it.
@JohnDoe Yep yep. Can't wait to see everyone at the secret "Left Hand/Right Mind" meeting. This years topics are: Lists, do we need them? & getting up before 11am, another obstacle designed by right handed idealists.
As a righthanded person who plays guitar, I'm often amazed at the intricate fretwork I can accomplish with my left hand. Yet, if I try playing lefthanded, the same left hand becomes utterly spastic when I use it to strum.
I'm a mixed handed person who plays guitar right handed. I just tried to play left handed. I noticed that my left hand is bad at plucking/strumming but my right hand is down right useless at fretting.
I think in general my left hand can do a better job of copying things I'd normally do with the right, but the right is not as adaptable.
And watching lefties is confusing as hell. Lol
I'm a leftie who plays right-handed because one of my first teachers said it would be easier. As others say it would be near impossible to change now. I think it's as much to do with training than handedness for guitars, plucking and fretting are very much learned skills (not intuitive).
I was gonna come say the exact same thing, the left hand being the fretting hand is such a weird anomaly.
@@blitheringrando1410 right? It seems more logical that the right hand would be the fretting hand (for a right handed person) as it requires more fine motor control with some of the triciker chords, arpeggios, hammer ons, bends etc.
PBS host: Being a leftie can have advantages
Me, a leftie: oh really? How many decades/centuries did it take you to make scissors that work for both hands?
Its not because it is so difficult, we just prefer you lefties have no sharp and pointy objects... we are keeping an eye on y'all!
ikr lol. As a leftie you're forced to learn how to used tools, eat, etc using right hand. Some people demonized left hand so much they would constantly asked about why you primarily used left hand lol
As a leftie, I can use scissors quite erm, handily. I’ll posit that lefties are better at adapting to their environment. There is a much higher preponderance of lefties among aviators than in the regular population.
@@muhamadsayyidabidin3906 “Why I prefer my left hand? Oh I don’t know, why do you prefer your right hand?”
You guys are smarter.
Leftie advantages: You always know what to say when the teacher asks a fact about yourself, so you get to sit down quicker.
The newest selection pressure in human lineages: icebreakers.
@@unexpected2475 That's actually true. only those with icebreakers get to procreate, meaning that is natural selection.
Both hands master race
@@karsten69 My icebreaker doesn't work that well ... "Hello, I'm austitic" tends to end the conversation rather quickly or makes it way longer that it needs to be.
@Jay Bird Also... Ambidextrous is indeed the way to go, welcome to the party.
I kinda wish I was ambidextrous, ngl.
Im whats called Cross-dominant. I can use both hands, but for different tasks. I cant write with my right hand, but I play golf right handed. Some things I can do equally well with either hand. Some things I suck at with both hands. Playing things like tennis or rounders when I was a kid always confused me. I never knew which handedness I should be.
Well u suck in most😂😂
It's actually called ambidextrous.
@@kylemenos I also thought this until a few months ago, but looks it up, they're different things
I'm similar. I write, throw left handed while golf, cricket etc bat right handed.
@@murraysmith595 my grandad was right handed through and through, apart from cricket, which he played left handed. If I inherited left-handedness, however, it probably wasn't from him. More likely the other side of the family, which is wrought with lefties. I think I just adapted to the right handers way of the world
lefty: *uses left hand in the middle ages*
everyone: "iS tHiS wiTchCraFt?"
My dad was in school during the days of corporal punishment, he writes with his right hand but does everything else left handed.
I feel his pain.....
@@peterharrison5833 I am sorry.
I went to school with a set of twin one left one right.
Good school let her write with her left.
Good humans do good things nicely.
Me : being ambidex and write with left hand in modern day as a kid
My muslim mom : DONT USE LEFT HAND!! SATAN IS LEFTY!! DONT BE LIKE SATAN!!!
Ikr
I am a RN and I worked on a neurological unit for several years. Part of my patient population was stroke victims. One thing neurologists and neurosurgeons always note is the patients dominant hand which identified the patients dominant brain hemisphere. This is because if a person had a stroke that effects the non-dominant side of the brain, they have a higher percentage of recovery because the dominant side of the brain can take over for the damaged side. Now this is very simplified and there are many other factors, but it was always something that was noted in their records.
What is an RN? I'm so used to military videos that I thought it was Royal Navy. I'm guessing it's some type of nurse but what is an R nurse?
I've been reading reading a couple of Wikipedia articles on left and right handedness during watching this video. And some of the writing and Wikipedia is terrible. Instead of writing right and left there are several sentences where they say right and "non-right-handedness" Instead of saying right-handed and left-handed. Can you imagine writing "non-right-handedness" instead of left-handed? :-))
It makes reading it difficult because there is mixed terminology between positive and negative depending on the study that they're referring to and then they're mixing positive and negative when using a terminology for right or left-handed instead of just using right or left-handed.
And Wikipedia writers can be quite crap!
Strange how some studies can say one thing and then another set of studies can say the opposite thing and then another study can say there's no difference at all. They can't all be right.
@@Google_Does_Evil_Now registered nurse
I wonder if they were including ambidextrous people in the “non” category? 🤔
@@honey2683you know what though? Who's a non registered nurse
Brh. I’m going to rock my future stroke recovery.
I’m ambidextrous
One important group is left out of this conversation-- musicians. Most instruments incorporate equal dexterity in their mastering. Born right handed, playing drums made me reasonably ambidextrous. They even have a name for it--"matched grip"
Nobody cares about musicians
As a leftie I’ve often wondered why right handed guitar or other string players play the way they do. In my perspective, I’d rather have my dominant hand doing the note positioning rather than the string plucking but I’m assuming this is just my view. So yeah, I’m a leftie that happily plays a right handed bass guitar.
@@josalee6479 Being a drummer I have often wondered the exact same thing-- how come you you guys don't use your dominant hand doing the complex note positioning? This just goes to show you how we ignore the potential in our subordinate hand.
There are quite a few strongly-handed instruments, such as trombone, trumpet, tuba, French horn, etc. The trombone can be somewhat reversed (Slide Hampton), and it's somewhat easy to play the trumpet left-handed, but you need a custom instrument to play the French Horn or tuba with a different hand.
"Although we're the only species on Earth that's so strongly handed" My man's never seen a fiddler crab, I guess?
Good point , look at lobsters
Did you see those other guys? They were like giant claws with bodies attached!
From what I found Fiddler Crabs have an enlarged left claw. If they lose the enlarged left claw the right claw grows in size to replace the lost one however their lost claw will grow back as a normal size claw. If they lose the right claw after the left has been damaged the left claw will grow in size to become a large claw and the cycle repeats.
That said the left enlarged claw is for "jousting" with other males, defense, offense, etc and the smaller claw is the one they use to feed themselves with. This makes the Fiddler crab right clawed with an enlarged left claw unless the left claw has been damaged or lost.
@@diefenbaker7853 probably because the giant claw can’t reach their mouth... but if they lose their smaller right claw, they must have some way to survive until it grows back... right?
I'm pretty sure they specified placental mammals, which a fiddler crab definitely is not
I am a left-handed woman. My aunt is also left-handed and now we have left-handed children. There’s always diversity in nature especially in humans. We have two hands, it just makes sense that some people would use the left one. We are a minority as I understood when using the Green coated scissors in kindergarten and other left-handed things in school. No one told me I was wrong because when I was a baby and my grandmother wanted me to feed myself with the tiny baby spoon I always grabbed it with my left hand. As she always gave it to me in my right hand and I always switched it into my left hand before trying to use it she became convinced I was a left-handed girl. And once she was convinced she would not let anyone in the family try to make me right handed. I really love my grandmother, bless her soul.
Sounds like a great grandma
@@NinetyLegos True love never dies.
Even I wanted to be left handed for a long time and tried playing cricket with both left and right, I can play cricket with left but not other activities. It's all in nature.
I don't know if it makes sense. As the video mentioned, we seem to be alone amongst animals in this regard. I can totally imagine an individual animal whose hand preference, or wing preference or fin preferences is perfectly balanced. In fact, I would think that for flying animals, it would be a necessity lest the creature not fly in perpetual circles.
I’m both handed and 2 of my friends are also both handed. I eat and write with my left hand but my right hand is stronger and used more for sports
I once had an encounter with the greeter at the grocery store that I frequented, an older man who only had one arm (it was his left, and I got the idea that he had lost his right arm at a very young age.) I visited the store shortly after badly breaking my left humerus and was in a full left-arm cast from my shoulder to my hand at the time, and he stopped me to ask about the injury. He asked if I was having trouble doing things with a broken arm, because he had "heard that people prefer one hand over the other". It was so bizarre to hear from someone who had no personal experience with handedness.
Surely he'd have experience with left or right footedness? For example like in football
@@olopaxx maybe he only had one leg too.
The key is in the word ‘handedness’
@@JoBrew handedness and footedness feel the same with regards to preference for a specific one. He wouldn't have had to hear it from someone else otherwise
@@olopaxx I'm right handed, though not overly so, as I mentioned in another comment - I do a lot of things with my left hand. But I have *never* felt anything "handed" about my feet. Feet are used very differently from hands where one hand typically holds something and the other hand works on it.
I love that you guys not only explain the 'what', but you also explain how we know these things. I have lofty hopes that people who are less cognitively inclined can understand these things better rather than grasping onto conspiracies that require mental gymnastics to fit a narrative for things they don't understand
I had an lovely aunt (now deceased) who was a University Math Professor, and who was also ambidextrous. I was told that the 1st day of each class she would enter the room, quietly face the blackboard or whiteboard, then put up TWO complex mathematical equations - _SIMULTANEOUSLY!_ From that moment on she had *every* student's attention. 😉👍
(I miss you, Aunt Jean!)
As someone who fears math, she would terrify me lol
@@WouldntULikeToKnow. It's not the math you fear, but your own lack of comprehension.
@@lonestarr1490 Indeed, but Math scares me. People fear something they don't understand, from aliens to a simple math problem.
She must've enjoyed doing that to new classes. What a flex.... ❤️
Bro I can write decently with both hands but could NEVER write two different things with both of them at the same time. That takes some serious coordination!
I am surprised that eye dominance wasn't mentioned because there is usually a correlation between the two. When aiming and throwing and other handed activities, having your dominant eye towards the front is a huge advantage.
Yes! I just started taking an adult art class and they had us identify our dominant eye. For anyone who wants to know how do it, you hold out both hands and make your thumbs and pointer fingers into a triangle. Then center an object inside the triangle, and close one eye, trying both sides. The object will still be centered when you’re looking with your dominant eye. I’m right handed and left eye dominant, which is wild, because my left eye is also more near sided than my right by a few points. I assumed my slightly better eye would be dominant, but nope. Super interesting exercise.
As well as leg/foot dominance
@@rixatrix wow I never even thought of this. I'm left handed and I've never had glasses but my left eye vision has always been very fuzzy and all my clarity comes from my right eye which has perfect sight. Sure enough I'm right eye dominant which would make sense for being left handed.
@@NathanBarley-h6l exact same story here!
So is there a known association with eye and hand dominance? If a person is right-handed, is it more likely that they are also right eyed? Or left eyed?
the worst are the scissors that are designed to be so painful to use if you arent right handed 😭
True, you can buy left handed scissors
girl yes. as an industrial seamstress i can tell you even the left handed scissors work better right handed 🙄
Spiral notebooks are a pain also
@@cutworm7027
As in, they only mirror the shape of the handle and not how the blades actually cross each other? That’s sloppy and ignorant of the manufacturer, since it’s how the blades cross each other that _really_ determines whether a pair of scissors is suited for left- or right-handed use.
I think I have a problem, because I'm left handed and use scissored like a right handed person
My granny was left-handed and as a kid she was forced to write with her right hand at school. As a result, her handwriting always sucked later in her life. Even at old age, she complained about these experiences when she was young.
My grandma was the same. She was the only one who noticed I was ambidextrous growing up. I always confused her because I would randomly switch my preferred hand for tasks. I didn't realize I did that until she asked if I was actually left handed trying to be right.
I'm a piano player and it is usually pretty easy to see what kind of handedness the composer has just from looking at the music, most people are right handed and tend to write more difficult parts higher on the staff. As a right-handed person, imagine my shock any time my left hand has to work more than my right
Who was a left handed composer?
Omg, is this why I don't like piano music much? I have a strong preference for lower notes - in voices, strings, brass, woodwinds, etc. If most piano music leans toward higher notes because of right handedness...
Fascinating l was not aware of this
Makes total sense and something I've never thought about. I guess they don't make piano's with a reversed order of keys to accommodate.
As a non piano player but with a growing interest in music structure, I assumed this was because bass lines are often more repetitive and consistent and then the higher notes sort of 'play around' that grounding line?
I only realised I was ambidextrous when I was about 10, and found out that right-handed ppl don't "just choose to use their right hands most of the times bc of social reasons". I was shook.
Being ambidextrous is pretty interesting to me. I'm actually a bit confused that I don't feel that way at all. I was born left-handed, but when my mom saw me drawing with my left hand as a kid, she told me that you have to draw with the right hand, because she was apparently afraid I would get teased by being left-handed or something like that (strange, I know). Since then I've been right-handed my whole life. And my right hand feels very dominant now. But you just never thought about which hand you were using? What about when you're writing or drawing? Are both hands the same to you?
Also ambidextrous. Back in kindergarten, my teacher forced us to choose one hand over the other, so after a week of fussing with it, I went with my right hand. It was easier to write with, with English flowing from left to right. Never really thought about being ambidextrous until I realized that I had a left preference for opening soda cans. Blew me away. I started paying attention to myself after that, and discovered my preference changed depending on what was more effective. And I was over here thinking I was doing it the “right” way the whole time
I think there are simply more neurons in the stronger side. More neurons means more muscles get activated giving more control and a stronger arm. It would explain ambidextrous people like yourselves and people who have opposite sides like being right handed but kicking with your left leg
@@Painted_Owl similar to my experience! Never had to strongly choose, but just went with whatever felt right, which often meant either hand. A few things are a bit stricter - I play guitar/bass left handed, but everybody around me said I should play with my right bc it is easier to find instruments and stuff. Bad advice, and bc I did not have a left-handed guitar, I ended up learning to play with my left hand on an "upside down" instrument. That one still annoys me haha
I was born left handed but thought I was wrong for using my left hand so learned to use my right. Now I switch between hands depending on the task or if one arm is tired.
I’m a left handed boxer (southpaw) and I used to go into the ring with my opponent in a right hand stance until my opponent was tired or if I was losing the fight. As soon as one of those two things happened, I would wait until the next round and get into my Southpaw stance and when my opponent saw the switch, you could see the dreaded look in his eyes. Priceless 😂😂😂
In the gladiatorial arenas in Rome, left handed fighters won more often cause they had the surprise and fought right handed opponents and hot use to their fighting style
Isn’t that the whole plot of rocky?
I think I am right handed, but somehow in boxing I prefer the left handed stance as I hit harder with my left straight n hook, right is comfy for quick jabs though. And somehow I feel that my right uppercut is stronger than my left. But yeah i feel at home with the lefty stance.
@bobby shmurda's Hat no,it's Rocky2
They do say lefties are better off in fights. Makes sense
7:23 Darts relay on eye dominance. It’s the same as in archery. It can or cannot be same as your hand dominance. I’m right handed, right footed, right eared but left eyed dominant. I discovered whe I started archery and have to either use a path on my left eye and use a right bow (with deepens sense decrease) or use a left bow, which I did
I do my eye makeup like eyeliner and eyeshadow with each hand corresponding to my eye. I can also use a knife, thread a needle, sew, and do almost any other non-writing task ambidextrously. Unfortunately when I was a kid my teacher saw me regularly write with both hands and told me to stop and only use my right hand. So I can't write well with my left hand anymore.
that makes sense, the teacher probably didn't want to correct assignments with smushed ink if she didn't have to.
@@tafazzi-on-discord I suppose but it makes me sad, it would've been a neat party trick to show off how I can write with both hands lol. At least I can still draw and craft with both hands!
@@foxwaffles In my opinion drawing is still more impressive :)
Us ambidextrous people are the superior species. The one handed people have been trying to hold us back for thousands of years
Jealous of the eyeliner thing. I am ridiculously right handed. To train for a rock climb, that had the crux pulling with the left hand, I trained the left arm exclusively. Like Ricky from Lady in the Water.
In Europe, passage in tunnels underneath the castles and stairways were turning right. For it was difficult for right-handed attackers during siege to strike "behind the corner".
Thus, left-handed squads were formed and highly used for their striking from left to right with ease - somewhat of today s.w.a.t. reminiscence.
Warwick castle
@@kristinemorley4337 cockwack castle
That's interesting
This is the case with Neamt Castle in Romania, where the medieval bridge has right turns
That explains that odd past life memory of tunneling with swords.
Charles Xavier: "Welcome to the X-Men. What's your mutant power?"
Me: "I'm left handed."
Haha.
Me : "I cant see green!"
Me: I can move my ears
Charles Xavier: *fascinating*
I’m left handed and have the rarest blood type in the world, ABneg.
@@AlexTonar, Hello. fellow Lefty! I am left handed too!
#Unique #Left-Handed.
I write left handed and throw right handed. I tend to do more dexterous things with my left and when I need more power than precision I use my right. I play golf and like to swing right handed and putt left handed (mostly). I've always felt fortunate to be able to use both hands quite well. The interesting thing is that my left leg is quite average in opposite side coordination while I almost exclusively use my right leg.
this comment section would have you believe that 80% of humans are left handed lol
Right handers don't feel special enough to comment. We are just observing out of curiosity.
Haha, good point. Grateful for some sort of affirmation! (Speaking as a left-hander.)
@Sapient Sepiid yeah, but use the sword with my right hand, heh!
Lets kill all right handers
@@maxsmart61 we won't have an advantage tho
I taught my son to read and write pre-school. I'm left handed, he just naturally copied me. However, it seems he's more naturally right handed. Now, as a dentist his ability to swap sides or hands appears to help him a little.
I always saw the advantages of using both hands since I write right handed and throw lefty. In elementary school I thought I could be doing my work and throw stuff at the same time, so I could be like “no I didn’t throw it, see I’ve been writing the whole time.” ha
@@martianmurray ah yes, incontrovertible proof of advantage. 😁
Wow he became a dentist 👍
@@martianmurray My father wrote left handed but threw right handed. But he could also paint with both hands. And when I did boxing as a kid, I learnt how to switch from Left to Right so no one had an advantage.
@@therewasoldcringe me too, I write with right, but most everything else left. I think I was probably taught to write with right hand in school like "normal" kids, but things that I wasnt taught to do, like doing makeup or using a can opener or using a spoon, I use left hand.
there isn't anything I can do with both right and left hand. only one or the other. I suppose I am anti-dextrous
My mother was a leftie and got forced, as most were at the time, to learn to write and do other things right handed. So she became semi ambidextrous as a result - she could even hit me with either hand, though I think she preferred her right hand for that, and for throwing shit at me.
This was what I endured as a child, I remember having my left hand put in a mitten to force right handed writing, this was practiced right into the 80’s in Ireland . But I’m a true leftie that’s just learned to adapt to a right handed a world like all the other lefties....I can’t even find a left hand emoji now 🙀
Yeah. My mom lightly tried to make me a righty, but from birth I was VERY left handed. Doing things with my right is akin to using a foot with long toes. With practice, a lot is possible, but it ain't ever going to be a "real hand".
I can hit with both hands, i use right hand for really powerful blow, like throwing and punching, but write, eat and others using left hand.
My mother is also a leftie and was forced to write with her right hand at school. The teacher would smack her hand with a ruler if she was caught writing with her left hand! That is until my grandma found out... she was a fierce lady about her kids!
My father was the opposite. He was a righty but his sister didn't want to be the only leftie in the family so she insisted that he learn to write left handed.
My grandmother was left-handed until the nuns at her catholic school smacked her knuckles with a ruler enough times to “retrain” her. Insane.
As a lefties, I just figured out how to use a can opener this year, I have to say I'm proud
As a rightie who still can't use a can opener, I'm proud of you too
As a lefty* ...
Scissors always work better in your right hand
Me and my son are lefties, and he just figured the can opener out last week lol
Lol no wonder people made fun of me for not knowing how to use it, forgetting I’m left handed
Octopuses have handedness and will either prefer their left front 2 arms or their right front 2 arms. They also have a lateralness about them even though their neurons are spread across their body. They also are more likely to be right-handed,and they also use tools.
This is the most interesting comment I've seen those whole section.
Wtf this is way Too cool
I definitely think tools and handedness go hand in hand but the octopus righthandedness is intriguing. I assumed humans took up the right handed way due to being taught that way elder to junior but a documentary I watched about the intelligence of the octopus was intriguing as the young and parent have literally no relationship after birth so how does this right-handedness continue. Perhaps totally (or much more) a genetic selection whereas us humans a lot of it is expressed due to our environment irrespective of genes.
My late Dad was right handed except for eating. The first thing he would do when he sat down to eat he would swap his knife and fork. As kids we would prank him by setting his place for left handed so that he would have to do a double swap. Miss you dad ❤️
I am the same. Except no one pranks me, they just call me wierd
I've gone years without knowing where to use the knife and fork. This made me very clumsy until I started using them the right handed way, but I still do use them a bit strangely when I don't know what I should use the knife and fork for.
Or he was taught to,eat by Europeans.
I'm the same. I don't trust my left as I'll miss my mouth and get my nose
I never understood why it's standard to hold the knife in the dominant hand. This has always felt wrong to me. Doesn't the fork obviously require more precision? The knife just uses the fork as a guide anyway.
I thought about this alot recently as though I've always been right handed, I learned to do everything with either hand as i got really busy. Its surprising how easy it is to "develop " coordination in your left hand. I came to the conclusion it was easier to build tools to work with one hand than to build tools that work with both hands....from birth we get used to using our right as everything is built for right handers and watching our parents and everyone using their right, doing as we see is pretty natural..it is interesting to hear about the different parts of the brain being tied to different hands and different things we do though..
Interestingly, most horses prefer their left side, that is to say, they find it easier to flex to the left, and take longer to learn skills on their right side. Horses have a split brains, so they literaly have to learn every skill twice, once for each side. There is a theory that the costume of mounting and leading a horse from his left side came because it means we bring our stronger right side in contact with their stronger left side. And another theory suggests that we unconsciously bred left-leaning horses because we found them easier to train and ride.
This is cool I hadn't heard of this before :) my loan pony finds his right side a lot easier than his left! I heard that we mount on the left because when warriors had swords around their waist it was on their left so that they could pull it out with their right hand and getting on from the left meant the sword wasnt in the way.
I think it's because we would throw our right leg over the horse first, and stabilize on the left leg.
@@morgans6544 my father said that British drive on the left side of the road so that their sword arm was closer to a potential enemy or highway robber on the right. I don't know why this didn't catch on in other countries.
Id say its probably the second. Would be interesting to see how wild horses compare
@@nickbarton3191 I never thought of that! That's a very interesting theory.
It's amazing how smooth the host rocked his outfit of the day
Looks like the type that enjoys hackey sack and dislikes paying back his debts, or, in other words, a left handed guy
@@viktorkukuruzovic5332 lmfao
He's in ridiculously good shape too.
Am I the only one that's dying to know what kind of shoes he was rocking with that outfit
Every outfit you wear is the outfit of the day
My buddy who is right handed broke his hand & started using his left hand , he was not able to use his right hand for an extended period , he continued to use his left hand & later was able to use both hands equally fine , he could write the same way with both hands & played sports with either hands .
Same thing happened to my cousin when he was a kid. Could right and play sports equally with both hands
When I was in preschool I remember learning to write the first time. They told me how to hold the marker and I asked them what hand do I use. They said just whatever feels comfortable but both hands felt the same so I just followed suit with the rest of the class and started with my right hand. I can do most fine motor skills with my right hand, but I always played sports with my left or was able to switch. I can throw pretty equally with both hands and kicking is equal between feet
Same thing happened to me but it was my thumb on my left hand
how long was the extended period
@@joshuamirabal3617 thats called mixed-handedness and it's pretty rare, I have the same thing. Apparently one of the causes is abnormal neuroanatomical structure, I think it's especially with the size of the corpus callosum which is this connecting part of the two hemispheres. In ambidextrous and mixed-handed people there is an unusual amount of communication between the two sides of the brain. I don't know about you, but I've always thought my brain seemed to work differently than others
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00:00 🚀 *The video explores a scenario with a giant circuit to question how long it takes for a light bulb to light up when a switch is closed.*
01:29 🔄 *Unlike a battery, electricity in the grid is in the form of alternating current (AC), where electrons wiggle back and forth without a net movement. The traditional explanation involving continuous conducting wires and electron flow is challenged.*
03:26 🔍 *James Clerk Maxwell's breakthrough in the 1860s revealed that light consists of oscillating electric and magnetic fields. John Henry Poynting's 1883 discovery of the Poynting vector showed how energy flows through these fields, challenging conventional views about electrons carrying energy.*
06:20 🌐 *In a simple circuit with a battery and a light bulb, the energy flow is explained by the Poynting vector, showcasing that it's the electric and magnetic fields, not the electrons, that carry energy.*
08:51 ⚡ *The video emphasizes that energy flux only goes one way, from the battery to the bulb, even though electrons move both ways. It highlights the misconception that people often think they're buying or pumping electrons.*
09:49 🔄 *The analysis of alternating current (AC) is explained, demonstrating that even though the direction of current reverses, the Poynting vector consistently points from the source to the bulb.*
11:47 🌐 *The historical failure of the first Trans-Atlantic cable in 1858 due to distorted signals revealed the importance of understanding energy transmission through electromagnetic fields, not just the flow of electrons in conductors.*
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I feel like a significantly higher ratio of left handed people clicked on this video than right handed people.
Ik I did 😂
Yeah... We don't get left behind. 😂
Yeah I did 😅
Yup
Nah
Editor: "We are 1 minute short of footage"
Director: "Just throw in that footage of the monkey taking food from the human's hand 17 more times"
Lol
And rifles. The bolt hits you in the face.
They just made a ten minute video to answer the question of why most humans are right handed, and the answer they came up with is... "Well, we just don't know". Gee thanks, PBS.
😂
I thought that was a slip in the matrix that I experienced.
Literally was just thinking to myself I was itching for an eons video. I'm clearly well conditioned by their upload schedule
@@SnowyButterfly1 thank you for this
@@SnowyButterfly1 source? Because Humans and bugs are both in animalia and fungi are in fungi which is separate a separate kingdom (I think it is kingdom)
@@SnowyButterfly1 I am 99% sure this is false
@@SnowyButterfly1
I call BS on that. Fungii are a completely distant evolutinary group than animals.
It's all about hips for me. I'm right-handed and play many sports but I always main whichever hand is needed for my left foot to be forward such that power generation is a counter-clockwise hip rotation. E.g. baseball: right-handed, disc golf: left handed. (Same full lower-body and core motion, just different hand).
I think the eyes are also extremely important. If you have far better sight in one eye than the other, you're a lot more likely to use whatever main hand that goes along with that eye (e.g. shooting a rifle).
My best friend growing up was a very rare “true ambidextrous” person. He was perfectly ambidextrous even at a young age, with full 100% even control with both hands and he did tons of studies growing up about it and showed that his brain was symmetrical, to an odd degree even beyond the average ambi person. He would often do demonstrations writing with both hands, but also capable of writing backwards with one of them, at the same time! It was weird and kinda cool.
Pretty neat. I always liked people with interesting quirks, like my exgf with an odd heterochromia.
People are awesome!
was ur best friend growing up high iq, eq, what was his personality like? what kind of work did/currently involved with?
not sure what you mean by his brain beeing symmetrical, if it was equal on both sides he would be missing a brain functions since some are exclusive to the left or right side
I used to run a roofing crew. I would purposely hire a lefty because when coordinated with a righty things went quicker and smoother. Things like cutting off extra shingles would be done by the person more comfortable at that particular end of the roof. Sounds weird, but it helped.
Hey I'm a lefty roofer. I can see it being a small advantage. When I'm laying a shingle we are laying them out left to right if possible. I butt up the seam, use my right hand to line up the rain groove on the outer edge, then nail left to right. I think my left hand, being my gun hand, has a little less work to do than a righty doing the same thing.
That was very perceptive of you.
RIGHT! Car mechanics, construction workers, more.... we come in handy 💪
Football managers are now picking a left legged for left center defender and right legged for right center defenders because the lefty faces a right legged attacker the right legged faces a left legged attacker.
Sounds mad logical
I have a spearhead from a Zulu warrior. I was going through the channels one day. On passing through had seen a show on spear hunters in the Serengeti. So I started watching the show. Two hunters were hunting a gazelle I believe. To tire the gazelle one hunter with a spear stayed stationary, spear in hand above his right shoulder. The guy, circling for the gazelle around on the right same position with the spear. Their left arm was folded in near their chest. To protect vital organs and their heart. In case the gazelle's horn strikes in an attack. So, right arm out stretched gives greater distance away from heart. To completely protect your heart with your right arm means you have to cross your arm over more, slightly limiting your left arm and torso in certain situations. Also in the way they hunted noticed they also read the hunting seen left to right as the gazelle was mainly off to the left of them. So gives the chance to more easily protect the heart and provide a killing strike.
Matthew Bartolet, this is the best explanation. The heart is somewhat to the left, so, protection of the heart.
or, in the case of the left handed, actuation closer to the heart :)
cowards.
@@atomictraveller My brother and I are both lefties. However, we, like most lefties, do fine motor functions function like writing and catching a ball with the left but our right arm is stronger so we bat like a righty. This would fit into this hypothesis well since it means better protection on the left without losing the power of the right arm for throwing the spear!
You could describe 80% of lefties as left handed, right armed. And left footed.
@@Christobanistan that’s very interesting. I eat, throw, bat and shoot with my left. I kick, punch, play the drums, and play the guitar with my right. But still struggle with can openers, brooms, etc.
So I’d say I’m left handed, right armed, and right footed.
Also the biggest veins are on the left side from bottom to the top, majority of blood flow is on the left side
From my experience volunteering at a rescue, parrots are usually left-footed. They grab and manipulate things much like a hand, and they do tend to prefer one foot over the other (more often their left foot).
Just thought I'd mention it, they too are bipedal like us and the kangaroo and since they're birds, they have a completely different evolutionary history, yet they also prefer one side over the other. It definitely suggests bipedalism has something to do with it.
Also to be noted, kangaroos lack a corpus callosum, the part in our brains that communicates between left and right hemispheres. So essentially, if the kangaroo does something with its left hand then the only way the right hemisphere comes to know about it is through external stimuli.
That’s so bizarre. So essentially kangaroos function like someone who went through a corpus callosotomy. I wonder if Kangaroos get seizures.
Yep. A more primitive Marsupial Brain.
Actually recent studies have shown that Marsupials have nerve connections between left and right side of their brains it's just simple nerves and nothing complex like the corpus callosum.
So if left hand fingers another kangaroo the right doesn't know?
@@jonathancummings6400 Funnily enough, some parts of the marsupial brain type would be way more effective than ours, if we could swap them... evolution be wack.
“70-90% to be exact” lmao
Thank you. That one gave me a serious WTF as well.
"TO BE EXACT"... bwahawah
He actually said "70-95%" hahaha even worse
Describing the actual range of possible values is more precise than pretending some exact number is known.
@@JackOQuin then he should have said, "to be precise" rather than "to be exact" and btw 'exact' is the key word.
My son was born prematurely, and we were told that the earlier a child is born, the more likely they will become left handed. We noticed pretty early that he was going to be a lefty.
There's also a myth that if you breastfeed the baby and you give it the left breast first it's gonna be a lefty and if you give it the right one it will be a righty lol, sounds like BS but who knows, I mean my mom told me she breastfed me with the left one first when I was a baby to test it out and I'm a lefty
Preemie leftie here!! 🔥
Well I was born a week late and I’m left handed
I was and am a lefty!
But why are prematures born left handed?
I started out completely ambidextrous, either hand could perform any task with equal facility. As I've aged my hands have specialized where most strength based actions are with my right hand, and fine motor skill actions are with the left. I would be interested to have my brain scanned and see what parts light up during different actions.
My sister was born a lefty. But when she started writing, she wrote upside and backwards. That is what she put on paper was not only mirror writing, but also inverted vertically. It scared me dad so much, he taught her to write right handed. To this day, she writes mostly right handed, but does most other things left handed. Fortunately it did cause her to stutter like I have heard it can when someone is forced to change.
The same thing happened to me. I am mostly left-handed but my parents forced me to write with the right hand and that caused me some issues... But still my left hand is more dominant compared to the left one.... And i only use my right hand for writing
I think you meant “unfortunately“ there.
@@hdbrot Actually, it was fortunately. I left out a not.
Poor girl. Its horrible to hear children being treated like this.
"Fortunately, it did not"
As an operating room nurse with over 22 years experience, I have found it not uncommon for everyone in the room to be left handed… on a major surgery, for example, 14 of the 19 people in the room were left handed.
As a lefty, we do tend to notice one another just because we know the struggle. Every single OR I have worked in has had at least 25% of the staff being left handed.
Curious about the correlation there!
hmm... surgery staff and US presidents, both more lefty than you'd expect!
I'm left handed, and you are correct about leftys noticing other leftys. I tend to notice other leftys without even trying to look for it. a couple of (examples) are 1: I noticed that former President Obama was left handed before most people did, before he became President. and 2: is and this one was more tricky, it's about one of my favorite guitarists Dave Hill. I didn't notice it emmediatly because he plays the guitar right handed. but then I seen some footage of him at an autograph signing, and I emmediatly noticed that he's left handed. what is really funny is I also Play the guitar right handed. I usually can spot it easiest when a person is using a pen or pencil. but I can also spot it other ways to, so I definitely agree with you about leftys noticing other leftys.
Very interesting
I wonder if it has to do with what side of the brain you favor? So more technical people favor left while creative people favor right?
@@rickycolston7861 I can't say in regards to that, but I do know left handed people use the right side of their brain, hence the old saying. "left handed folks are in their right mind".
"Lefties have better..."
Me: :D
"...coordination, memory, and verbal skills."
Me(with ADHD): D:
No worries I'm lefty aswell but their r certain things I can do with both hands like write but other things like cutting with scissors I'm not so good at. Maybe even though you have adhd you may better at somethin you haven't configured to such as thinking in different ways or seeing things from different perspectives
Hey a lefty with ADHD here too! Sorta cancels out, doesn't it :(
Also, there are studies of lefties have higher probability of having ADHD than righties. Interesting to look up!
@@jordy8464 dude what the hell are you me? I’m also a Jordan who is left handed with ADHD…. Is your ADHD like super severe?
As a righty with ADHD, I feel like I have much greater coordination than most people, because a grew up watching/feeling every muscle move, twitch, flex constantly. You still can't keep a ball out of my hands, but keeping my concentration level up was difficult in competition, and memory/social skills are crap.
Same but i have both autism and adhd and im left handed
My grandmother was born left-handed. However, she lived in a time period where left-handedness was seen as “evil”, and so her teachers and parents (along with other adults in her life) basically forced her to do certain things (like eating, drinking, writing, etc) right-handed. To this day, she uses her right hand for those things and her (at one point) dominant left-hand for everything else
It’s midnight, my brain says “sleep”, my left hand says **hits play**
In Australia toilets flush counterclockwise and Kangaroos are left handed. Nice.
Ah to be ambidextrous, I've always said "I would cut off my right arm to be ambidextrous"!
When we visited Australia I pointed out to my wife that the sink was draining “backwards” (counterclockwise)... she looked at me like, “did we really travel 15+ hours on a plane to look at how the water drains?”
My left hand made me do it.
Im disappointed there's no poll for you to see what percentages your viewers are for left/right handedness
@Morgan they didn't get rid of it.
@Morgan no, they didn’t
It's exactly 70 to 90 percent.
missed opportunity
@@PeterGriffin11 I think they mean the polls on the actual video, not community tab
Blake: Including me.
Captions: Including the dude here.
I'm glad I could include you. What did I include you in?
Ive just watched again with captions to see this XD
@TylerFortierPhotography go a little further and you realize this is how translation works, and most translators are literally making things up on the fly.
I only use my left hand for drinking beer so I take it with me where ever I go.
Not so long ago, kids used to get hit by the teachers in school for writing their left hand to write, the dad of one of my friends even ended up in the ER because the teacher literally split his head open with a ruler for it.
While most people are right handed, I do wonder how many more people would be left handed if it hadn't quite literally been beaten out of kids for so long.
That story is mental, I hope the teacher got fired.
@@GreenHairedKaiba they didn't, it was perfectly legal back then
@@Kiirxas Insane!
A five minute google search would have negated your need to accuse someone of lying. A standard wooden ruler would do that, and many old rulers had a metal strip that could be sharp. In Texas in the early 2000s being hit with a wooden paddle was still a standard punishment at my public school, although parents had to sign to agree to it. Idk what the rule is now.
I used to think it was because left handedness was thought of as witchcraft in the middle ages, and therefore bred out of the species. However, after watching this video, it is more likely that the tools lasted lifetimes and became predominantly right handed, forcing the adaptation of the left hemisphere, or be eradicated.
“There’s no right way to be human.” Beautifully said.
Ye! Only a lefty way to be a human!!! Genocide when?? That's why we're gathered here right?
There can be better ways from a social or evolutionary standpoint. But not right or wrong.
@@rairadio7119 yep. And the evolutionary and social standpoint have some very major differences.
Bcoz its left ◀️
There are wrong ways, though. If you eat other humans, you're doing it wrong.
When I was young, there was a trend in Russian school system to "switch" lefties to write with the right hand. It was explained that usually lefties have bad posture when they are writing, and all that stuff. So I was "switched" from my dominant left hand to right, but it only made me truly ambidexterous, because, well, you can't just switch your brain like that. I am glad that now this trend is long gone and that my children would not be forced to become ambidexterous. But I should admit that this "switch" made my way around scissors much, much easier.
This is exactly what happened to me as well. I'm from the former USSR.
Hey me tooo.. i used to be a left. I actually type on my phone with both
My dad and his brother were forced to switch from left handedness to right handedness (due to religious, superstitious reasons) and now neither of them can write with their left hands 😢
In United States in the 70's - I do remember some teachers would have left handers go to special writing classes during school to switch to right handed.But by middle school I recall teachers accommodating left handers.
I'm glad they stopped forcing the switch..
Happened to me in India.
It is just how you are shown how to do something. I taught my son and daughter to play ice hockey and baseball both left and right handed. As little kids they picked it up with ease.
When I was a child I was left handed. Then in my first year of kindergarten I tripped on my shoe laces and broke my left arm. My teacher the taught me to use my right hand for everything, 30 years later I am still right handed. I'd be interested in seeing what my brain looks like in a scan as a "right brained" right hander
Your left handed by nature
I’m sure you could pick up left hand again if you focused for a bit on doing stuff with you left. Then you could be ambidextrous
saved by the bell
@@Susmore21you'd have to re learn muscle memory
I had a similar situation, being left handed until I was 2 and then suffering a wrist fracture and switching arms, but I re-taught myself how to write, draw etc. with my left hand when I was about 7. I still describe myself as right hand dominant though because life is just built for right handedness, especially in school, so ultimately I can't write as quickly with my left and my grip strength is lesser (although my arm strength is greater?). If you haven't re-taught yourself to use your left hand for everything it would be worth a try!
LEFT HANDED GANG?
Here
hanging out with Ned Flanders at the Leftorium!
Here 😈
@@ecurewitz feel the wrath of the left hand of burns!
Present!
Most of my family members are either lefties or ambidextrous. We have always been very careful of who we sit next to during gatherings like Christmas and birthdays, so that we don't constantly bump into each others when eating. We have a lefties and a righties side of the table. I only very realized that it was an abnormal thing to think of. I went out with a group of friends and asked if we should organize the table according to hand preferences. They were all right handed lol
Same. My family is equally mixed. At big get togethers we try to sit without bumping elbows.
What if the real reason for right handedness is actually that simple? Because otherwise we would constantly bump into each other so when working in groups it made sense for everyone to use the same hand
Yep I have that issue. I try to sit on the left whereby no one sits on that side otherwise we'd be bumping elbows while eating! One of my brothers is also left-handed though thus we often sit next to one another. Our Father was also left-handed.
@@JennLeighB if that happened you could just move, evolution only really happens when it provides some advantage to our syrvival and reproduction
As a lefty ive always had to sit at the end of a table so my dad wouldnt get annoyed from me constantly bumping his arm
0:34 70 to 95 percent of us to be "exact" always gets me!
The Kerrs of Castle Kerr in Ireland were almost all left-handed, so much so that the spiral staircases in the castle have a reverse twist, to favour defending left-handers.
Woah that is actually really cool, I have to go there!
But that will simultaneously favour right handed attackers.
I think it is in Scotland
@@KaitainCPS Fighting up stairs is a fair bit harder than defending down them. If you've ever been up any of these old spiral staircases you'll know they're a form of defense of their own, so steep.
Lol my friend’s a descendant of that clan and he’s a righty, but I’m a lefty haha. That’s kind of funny to learn about them. I’ll have to tell him next time I run into him at the bar 👍
I’m a lefty and I thank my grandmother for that. When I was a baby I used to always grab my spoon to eat with my left hand and my mom would always try to correct me and make me use my right hand. My grandmother just let me do what felt natural to me. So I’m a dominant lefty but I am probably ambidextrous.. The only thing I hate doing left handed is writing in a notebook or with ink because your hand gets covered in ink dragging your hand thru the wet ink as you write.
Yeah the struggle is real. The way I fixed this was to keep my hand slightly above the paper
@@lilchermerk878 Yeah. We had to write with a ink pen in school, it was hell lol. I always came home with a little bit of ink on my left hand but the teachers didnt allowed me to write with a ball pen for years :/
It was the opposite for me lol my parents did t really care but my grandparents tried to change it
I thought this was just an Indian parent thing
This used to happen to me all the time but I adjusted by turning my pages so I would basically write up and down (instead of side to side) but my brain would flip it right side up. Whenever my new teachers saw this they always acted so surprised that it works.
In the 70’s growing up, my grandmother would tie my sister’s left arm down so she couldn’t use it, because she believed being a lefty was a thing of the devil.
Wtf I thought it is only a American Dad comedic trope
Wow, I'm amazed that still happened so recently! They used the same technique on my grandfather when he was a kid to force him to use his right hand, at least for writing,. That would have been just before WWI so, more than 100 years ago.
@@nessunodorme3888 my grams lived to be 102 and died in 2016 so that would have been close to the same generation. She was very old school, lived in the same house her whole life, had a basement full of home canned food for emergency, raised her own cattle for meat and milk. She was quite amazing ! 🤍
@@nessunodorme3888 They'd done it with my father when he was at school.
He was born in 1969, pbbly this happened in 1974 or so
@@Nov1cegg Wow! I never imagined anyone still did this that recently. Out of curiosity, was this in a remote or rural type place? Sometimes ignorance persists in places like that.
Another leftie living in a right handed world. My older brother taught me to swing a basball bat - right handed of course, so I'm a bit a switch hitter, though I actually prefer to hit (and golf) right handed. Still swing tennis and pingpong rackets with my left hand. Being a leftie also helped me when learning the piano... my left hand didn't struggle with bass lines, and my right hand dexerity was already well developed so the instrument just really brought the skill level up on both sides.