I'm definitely still evolving. This isn't even my final form! Leave me a comment and let me know how weirded out you are by the future prospects for human evolution
In a lot of cases the Bajou people lose their hearing as they get older due to the constant diving under water. So they have this amazing ability to hold their breath under water for longer than anyone else but the constant pressure changes damage their hearing overtime so they essentially traded their hearing for the ability.
Not just the Bajaus, the Orang Laut (we call them the Sekaks in my island) of Sumatran eastern coasts and the Mokens of southern Myanmar have this adaptation too. The Mokens even take it further. They can see clearly underwater without the help of goggles. And they all share the exact same lifestyle. Only in different places.
5:50 I’m half Native American and half European, and this fact blew my mind. Some time in the past few years, my earwax changed dramatically. From what would be considered Native to European, according to this… My doctors seemed confused by it. Dormant genes somehow switched on due to age maybe? So weird.
You're all forgetting the relatively new understanding of epi-genetics. While acquired traits cannot affect your genetic makeup, your environment, or even the bygone environment of your parents, can influence what genes turn on or off and when. As one ages, it's entirely possible for a set of recessive genes to "switch on."
The same thing can happen with lactose intolerance; not everyone who suffers with it has had it from birth. It's common for someone to develop it in their mid-twenties.
The LOSS of certain kinds of natural selection can also have an effect on our genetics! For instance, I've heard that the average size of babies' heads at birth is going up! It used to be that a baby with a big head could not fit through the birth canal, causing death for both child and (usually) mother. That was a natural selection pressure that kept the number of people with big-headed-baby genes low in the population. But now, with safe c-section births, these babies can be born! This means a larger number of people in the population can now have genes for big-headed babies.
The same could be said for any genetically related cause of death, really. As our medical interventions become more effective the number of people with the genetic predisposition that survive to have children will increase. Which will have a positive feedback effect.
Hey, look at it this way: there's, like, nearly 8 billion of us who haven't died yet. That's out of only about 117 billion who ever lived, so the average death rate per person is really only 93%! Could be worse!
If it wasn't for modern medicine, I probably wouldn't have survived my childhood. I spent a lot of time in hospitals and took lots of antibiotics as a child, and now I take a medication that saves my liver from inflammation and possible cancer, which actually ended up killing my grandmother who has the same liver disease. I wonder if medicine is allowing some genetic disorders to be passed on since more children survive?
Modern medicine has certainly allowed people to survive to reproductive age that would not have a century ago, but I'd say a minor downside to modern medicine. Take your own case. Are you fitter and healthier than most people? Are you more likely to successfully reproduce than a genetically 'normal' person? I do know of cases where people have been diagnosed with a genetic disorder that either has effect after they reach adulthood or is recessive and have chosen not to have children or at least have any embryos screened. So it works both ways. And with the rapid advances in DNA tests, I'd be inclined to think modern medicine will gradually start to eliminate genetic diseases
@@mechanomics2649 oh ok...I don't mean eugenics. I mean, we're looking for diseases that can negatively impact a child, but I can see the ethics of even that. I guess I didn't read their comment well enough.
This was a really good presentation. However it seems as if the topic(s) covered were rather broad. Could the production team consider going a little deeper on each of these sub points? Perhaps a small series all based on this one subject? I found myself fascinated with this and want to know more. Well done! It’s almost as if you are trying to get people interested in the subjects you cover. Please - MORE! -
I sent him a message on his Patreon account a while back, in which I gave him a reason why evolution is literally impossible. He even replied back to me, so I know for a fact he read it. My point for mentioning that, is he flat out lied to more than 300,000 viewers, and he assumes it's fine. You shouldn't trust him, and need to double check his claims.
So if a Himalayan has a kid with an Indonesian, that kid might be able to hold their breath for 16 min with little effort? Larger spleen + low oxygen breathing = “I only need to breathe once every 15 minutes?”
Depends if its recessive or dominant, could be just as us if its inherits the small spleen of the Himalayan and the high oxygen breathing of the Bajau :)
@@seanrea550 yeah but, i forgot the details, but theres a himilayan ethnic group that have very powerful breathing capacity, and their people dominate the amount of people who have hiked Everest. if you want more details go google
From what I've heard, milk drinking only evolved in humans once or twice. Most likely, most humans who can drink milk got that gene from a mutation shortly before Northern Europeans and Northern Asians split and then that gene spread more widely from there. But some think that it evolved in both Northern Europeans and Northern Asians separately after they split (I find that less likely, but I'm no expert). And then much more recently, a population in Northern Africa developed a completely different mutation to dogest lactose. But that mutation hasn't had that much time to spread yet.
It evolved in what's called the Siberian Steppe, and it helped to spread far and violently across Europe, they're known as Aryans, Kurgani, or Yamnaya.
still doesn't explain why you will eventually be able to digest lactose when you expose urself enough to it. its not like u suddenly evolved new anti-milk genes or deleted something after you grew up. the tolerance to lactose changes depending on exposure. anything that is great for you will have some tolerance bs to ruin the fun
The first thing I thought of as a cause for evolution is how many children we have. Couples who have more children are contributing more to the collective gene pool than those who have fewer children.
Correct. That explains why the average height in the Dutch population hasn’t stopped increasing. The main reason there’s a positive correlation between the height of males and the size of their offspring. That is, the taller the male, the more numerous (on average) his offspring will be. And that isn’t because taller men are on average more fertile but because they have access to more resources to afford a more numerous offspring.
I don't think that really contributes all that much to more populated areas like big cities since the offspring will just account for a smaller fraction of the population than if they were isolated in a small town. Granted, if their offspring continue to produce many offspring of their own over the course of several generations, we may beguin to notice more significant trends in the genetic drift of the overall population. Though, children that grew up in massive families tend to make smaller families of their own from what I've seen, so it's hard to tell if we'll ever see this phenomenon at a grand scale. Still interesting to think about nonetheless
The Bajao are known as good divers in my country. I did not know they have the genetic predisposition for working underwater. Thanks for the info. (Edit: should have bee genetic adaptation).
I only discovered this channel recently after stumbling upon the crossover with SpaceTime and Eons on the origins of life- but I am now hooked. Great content presented in a fun and informative way. Thank you for all the hard work.
Humans are not only evolving but we are also moulding intelligence in other animals with whom we interact and pet, like dogs. Dogs will become more and more intelligent as a result of our interactions with them.
Depends on how you define "intelligence". Dogs have evolved and are evolving to interact with humans better due to thousands of years of interaction with us. It is why most humans can almost naturally pick up on a dog's expressions and body language. Dogs are also more facially expressive than other animals because of their interaction with humans. Dogs have also learned to vocalise in a large variety of manners which other canids such as wolves and wild dogs cannot do because humans can instinctively pick up on such barks and vocalisations. In terms of basic problem solving skills and memory wild dogs and wolves are just as intelligent, if not more in certain cases, than domestic dogs due to natural pressures and the need to be adaptive.
It’s a gross misrepresentation by calling dogs animals that we interact with. We decide which dogs live, die and breed. Dogs are our toys, that’s the only reason for their existence.
When was the last time I was worried about getting eaten by a tiger on the way to lunch? The last time I questioned whether or not I would survive the predators around me long enough to make it to lunch, was about a week ago. The predators I was worried about, were my fellow homeless people making their way to the food line.
@@dad1158 Obama phones with EBB (Emergency Broadband Benefits) are a thing... I'm homeless, not jobless, and some (not all) homeless do survive by leveraging a predatorial mentality. Does that help you understand? (Sorry I didn't actually read your comment, I just skimmed it. Battery low, charging opportunities aren't great and I have other things to do on my phone.) Come to portland and ask for Grant Imahara at The Blanche House (not a shelter just a place to get a free hot meal and I'll show you my camp if you don't believe I'm homeless. I work during lunch so look for me at breakfast or dinner feeding only.) I've been living it for over a decade. I'm not here to spread disinformation, I'm just retorting what the guy in the video said. The fact that some other homeless people are dangerous is not misinformation.
@@mikethehunter5212 Honestly I don't remember either, but thanx for the sentiment. ( It was something like 'homeless people aren't dangerous, saying they are is spreading misinformation, I don't believe you that you're homeless.' )
I wonder if sexual selection is also influenced by how sexual attraction is passed down as a trait in itself. People who like a certain trait would be more likely to have kids with people who have that trait, passing down both the gene carrying the trait and the gene carrying their attraction towards it to their children. Given enough generations, people would just end up being attracted to those with the most similar traits(If sexual selection was the only factor and if sexual attraction was purely genetic. Neither of those are the case, but I am curious how much influence they would have)
Sexual attraction is mostly genetic. Romantic attraction is more important in modern times. Human females have two main criteria for a mate. His genetics and his physical and behavioral traits related to raising offspring. That is genetics and nurture. Sexual attraction is basically attraction someone's genetics. Romantic attraction, is attraction to the traits that made raising offspring more successful. Humans raise offspring in pairs, and evolved to split that role between the two sex's. The role of each sex requires specific traits. And it's those traits that humans are romantically attracted to. For women, in general they are attracted to tall, strong, fit, ambitious, confident, charming, successful, experienced men. The majority of women are attracted to these things. A study was done, mostly 10% of males are having sex with 80% of women. And those 10% of men overwhelmingly have the above traits. Human females evolved to find a romantic partner, and then find a sexually attractive partner to be a sperm donor to secretly concieve offspring. Then bring it back for the romantically attractive partner to raise. The sexual partner is good at genetics. The romantic partner is good at nurture (providing and protecting). Our behavior is heavily influenced by our genetics. No human can choose what they feel, want are attracted to, etc. It's chosen for us by our biology. And we mearly try hard to follow our "heart's desires" (it's really our biology's desires) and our biology "desires" the most optimal proliferation of our species. Emotion is the biological mechsnism by which our biology influences our behavior toward optimal proliferation.
Its also highly worth mentioning that as of right now we can insert genes but with low specificity. CRISPR/Cas9 only allows us to cut at a certain place, insertion orientation is not assured. CRISPR/Cas9 DA allows us to change a nucleotide but has limitations and is still in it early phases. We WILL get to better gene editing but its a long road
I actually did a presentation for my Evolution course about a paper that talked about whether humans are still evolving. The general conclusion of the paper was that humans are in fact still evolving due to increased gene flow and decreased genetic drift -- which are important to maintain genetic variety -- due to an increase in movability and a larger population size. Of course, I would need to look into some other articles to see whether this one is entirely reliable, but it was an interesting find nonetheless.
@@Youngnrrwhtjwtjetk Yeah. You should look for the case of hybridization done in India, Indian Lions + African Lions = a total disaster, sick and weak animals plus the reduction of Indian Lions. There is this study conducted in Oxford University regarding the disadvantages shown by """multirracial""" peopl, like bone marrow transplants/histocomaptibility, behavioural issues, besides the commitment in a mixed couple. I think my contact info is my google profile, if that's thec ase, email me and I will send you the paper. (I'm pretty confident I downloaded it)
I feel like in the future something might happen with our eardrums them being able to tolerate more noise or something along those lines since people now and probably in the future are still gonna be using headphones constantly
I read that as pants instead of plants on the evolutionary poster and was confused. Lol. Great episode. The whole designer baby bit weirds me out. So much of our advancements aren’t natural, yet picking and choosing the traits we want our offspring to have off of a menu is ICK.
People are already doing that. People are choosing which partners they wanna mix genes with like it's a menu. Certain traits, have always been attractive to women. Height, strength, fitness, confidence, charm, ambitiousness, assertiveness, etc. These are the ones mostly picked by women on the menu. Humans have an ability to measure a person's genetic flaws. It's called Fluctual Assymetry. It's a fancy word for beauty. People partially figured out how the brain calculates beauty (it uses mostly ratio's and mirror comparisons, and they're working on the rest. A lot of it is not superficial. E.g. You're immune system plays a big role in how physically beautiful and individual appears.
I'm excited for the future of mechanically integrated humans, but I'm scared of what could be done by the people who own the patents for those technologies
It's already happening. I'm a trans guy and have been on HRT for just over a year and got top surgery. People are already modifying their bodies in ways never before possible. And there are already issues with supply chain and availability of this technology. (There is a near yearly testosterone shortage across Canada. A lot of people think that it's a manufactured scarcity in order to keep prices high. The cost of hormones does impact some people's ability to meet their transition goals.) I don't think patents are going to be the issue. Rather cost and availability. I am hyper aware of the fact that being a trans guy in Canada my situation is very different than that of a trans person in say Russia or Uganda. As we further integrate technology with our bodies it's going to be the case (as it is now) of the haves versus the have nots. There will always be people who can afford the technology both financially and politically. They will in turn have increased purchasing power and the cycle continues. As an example, trans people who are able to transition and pass have lower unemployment and better work outcomes. So being able to afford to medically transition leads to better financial situations.
@@CorwinFound right, those are certainly relevant issues as well, but I was thinking more neural implants and prostheses that are owned by corporations who now have direct access to your mind and body. Subscription models for prostheses, the sale of knowledge directly from your brain, advertisements in your own vision. And of course artificial scarcity and inflated prices for life saving technologies owned by private interests.
There's always the option of changing the way we look at patents, intellectual property. The option is just severely undervalued because it has fundamental implications on private entities. These things have way broader negative impact on society than people think. The price of a ton of drugs is inflated, most notably for HIV, the way the legislation is today takes part in the severity of USA's opioid crisis. The so called vaccine apartheid and the speed at which we face the pandemic, are also related in part to this.
I'm more scared about the capitalists who will abuse that tech for their own profit at all costs - just like what we see today. Of course, many of those capitalists will hold the patents
I've been telling my mother (75) for years that all she lacks is the red laser eye thingies. She's had two knee replacements, several vertebrae in her lower back fused with plates, two more in her neck fused with still more hardware and ~three~ shoulder replacements. None of it is robotic, but at this point she's more aftermarket than OEM! 😆
I feel like, if we ever get really good an genetic engineering, that we could become something better than we are now. But it definitely won't be natural selection, but more so artificial. We very well could see superhumans at some point
I like to think of it as "deliberate selection" as opposed to "artificial selection". The things we do aren't somehow outside of the scope of nature; the natural world encompasses everything we can observe, including us.
Aaanndd welcome to our realization club that we still being halted in that department because of : 1 outdated ancient superstition 2. human right “ack”tivist bollocks (also caused by the issue no 1) for example that baby crispr experiment are being criticized and foiled by well.. you guessed which country that has 2 problems mentioned above...
People are definitely still evolving. Unfortunately, many people tend to conflate adaptation with evolution. Also, we are evolving much faster culturally than biologically. It wasn't so very long ago that the fashion was that men wore hats and powdered wigs. Cultural evolution proceeds much faster than biological evolution. Some ornithologists have observed cultural evolution in bird populations.
What do you mean when you say that evolution and adaptation tend to get conflated? Genetic adaptation to an environment IS evolution, though evolution is not necessarily adaptive. Is that what you meant?
@@blackoak4978 LGBTQ-Hating Hatepreachers (and other things...) run for Office + Congress right-now. If you can, vote Left; the Telltale Atheist can list to you all the Problem-Politicans.
@@blackoak4978 I live in a place that has varied by about 140°F (78°C) ambient temperature depending on time of year. We have seasons, and as winter approaches, it takes a little while for my body to adapt to the new cold, and as summer approaches, it takes a little while for my body to adapt to the heat. There are people living in environments that they have adapted to, but it's not due to differences in genetics, it's just within our existing tolerances as humans. I think what the OP is saying, is people often mistake those adaptations for evolution (especially if it's more extreme than they are personally accustomed to).
Here is a case where the proper use of terms is critical to clarity. An 'adaptation' is defined by biologists as a genetically determined trait contributing to an organisms 'fitness'. You personally are stuck with the genetic cards given to you by your parents. As such an individual can't evolve/change their adaptations. One CAN however become 'acclimatized' to changing environmental conditions within your genetic limits.
If we look back to evolutionary history, we will see that the majority of permanent changes were happening when the population of the given species was low. Low population means, that any change will much more likely to spread amongst the predecessors. It also means that the circumstances are likely to be not optimal, and there is a real need for change. Humans can survive as is very well without any change. So any beneficial mutation in anyone, will not spread out on large scale.
True, genetic drift is not likely to be a significant factor in humanity's evolution at this point. That might change if we end up nuking ourselves into annihilation (because the survivors will be back to the "low population" level), but barring that its unlikely. Even climate change isn't likely to do enough damage to the species as a whole to change that (or it will do all the damage if the worst predictions of runaway effects come true, but extinct species don't evolve either so same result). But we _are_ still subject to "natural" selection. Its just not a selection based on nature - its a selection based on our technological developments. For example, humans are strongly adapted to use the sky's blue light to drive our circadian rhythm. Assuming we continue to use screens or some other light-producing analog to screens far enough into the future, that adaptation will have to change. We don't get enough natural sunlight and get too much artificial blue light to maintain this, and evolution will (eventually) figure that out for us. Its a relatively small problem from an evolutionary perspective, so it'll likely take on the order of thousands of years before notable adaptation to having screens on all the time would evolve, but it will happen if we survive (and maintain our technological advancement) long enough. On the other hand, there's a more compelling adaptation pressure: People are having kids later in life. Those who are capable of having healthy children into their 40s are going to have a fairly significant evolutionary advantage over those who can't as society continues to push toward having fewer children later in life. That amounts to an _extremely_ strong selection pressure and could easily drive adaptation across most of our species within a few centuries, barring a significant change in the way our economic and political systems function over that time frame. Of course its also an adaptation that wouldn't have an easily-recognizable phenotype, so the only way we'd even be able to measure the change would be to track the success rate of births in later life stages, but even then it'd be hard to separate evolutionary improvements vs medical improvements.
@@altrag I don't see why natural selection should incide on screen light and so on. Even if a specific gene arises, it doesn't select anything. Why should the individual with that gene have a better fitness? But, you could be right about the late offpsring. A lot of people tend to have their kids in their late 30s and if they have some kind of serious health problem, they abort, so this is indeed a heavy natural selection. Maybe in the future people will yes have a better reproduction even when they're older, but I think that a trade off wil arise. Maybe it will be that humans start to enter puberty later and so their reproductive cells start to deteriorate later. I don't how cool would be to enter puberty later 😅
@@BioTheHuman > Why should the individual with that gene have a better fitness? Well that's the question now isn't it? There's a growing body of research showing that the blue light from all the screens around us is affecting our natural circadian rhythms, leading to poor sleep which in turn leads to a variety of negative health outcomes. And if you can avoid negative health outcomes, then you will be, on average, a fitter person (in the genetic sense - your workout routine is a whole different topic). Is that circadian rhythm disruption enough to trigger a selection pressure? I don't know. I just picked a random thing that I know happens to affect health outcomes in subtle but noticeable ways. There are any number of other things that could potentially trigger a selection pressure - tolerance for heavy metals as we continue to pollute our air and waterways. Better ability to notice and react to things at high speed (because we drive so much - fewer accidents). Body plans adjusted for longer periods sitting rather than being active. I can't say for sure that any of those _will_ trigger a selection pressure, but any of them _could._ And likely would if our way of life remained relatively unchanged for a long enough timespan. On the order of a few thousand years, at least. Not something you or your children or even your grandchildren are likely to see just happen one day. Evolution can be "fast" in the sense that strong pressures can trigger adaptation over the course of a dozen or two generations, but that's far too long a timespan for any individual to notice the change. It can only really be noticed in retrospect (and only if there's sufficient knowledge about the lifestyles of both the older and current generations). > I don't how cool would be to enter puberty later No more or less "cool" than it is now. Again, such adaptations happen over multiple generations. Nobody's going to really notice if puberty slips two or three weeks on average over the course of a single generation - it'll just get chalked up to statistical variability. But if that repeats over 20 generations then you've pushed it back a year or so, while no single generation among those 20 could tell the difference. So a scientist who decides to measure the average onset of puberty in 2500 and compare it against the data from 2100 will notice a fairly significant difference, even if they wouldn't have noticed when comparing against data from 2450 (assuming of course that we haven't invented some sort of new way of measuring things that's drastically more precise than our current statistical modeling, or are capable of genetically engineering ourselves to the point where such comparisons are meaningless or some such thing - 400 years might not be that long for evolution, but its a pretty massive jump for scientific innovation!)
I am a mutant. We found that my dads side of the family carried genes for extra muscle strands. Out of 3 sons, I was the one that inherited this gene which my brothers always found weird growing up. No matter how much taller and more muscled they were, I was always in the same weight class and could always lift the same if not more than them. We finally found this out when I was 15 as without any previous weight training I was able to bench press 400 pounds in a competitive lifting challenge bet us, adding more and more weight each 20 reps I stopped there knowing that I could have gone higher but I would struggled passed it. Later on when I was getting my body checked out on a completely unrelated note, they noticed my muscle looked weird and when they got back to me later, they told me that I had 15 more muscle strands per millimeter of muscle than normal people which not only makes me stronger but also makes me about 40-50 pounds heavier. Which is why I almost sink in water. Today after being starved at 16 and having a stroke at 17, I weight 210-220 pounds and I can still lift 300 pounds but I don't push myself anymore do to health reasons caused by the stroke. This isn't my only mutation however as I also have color changing eyes which contain green, brown, blue, yellow, and orange colors. I also have an extreme metabolism which causes me to lose up to 11 pounds a day if I'm working. When I first caught covid, I was quarantined to my bedroom, my sister was told to feed me but she only fed me one PB&J every other day and I was sick for a month in a half. Around the end of that my mother started to feed me because I came out and explained I was starving as despite the fact I was laying down all day not doing anything except fighting covid, I lost 32 pounds which at the time put me at 150 pounds and I looked like a Skeleton. Now I am a little taller, I'm still mostly muscle but always have a little gut because if I don't, a days work is horrible on my body.
@@basedostrich did I use the wrong word, or do you not believe me? If Reps means to lift 400 pounds all the way up above my chest and back down just above my chest before doing it again 20 times, then yes it was twenty reps. If reps means something else than I understand your confusion and that would be proof I didn't do frequent work outs. I wasn't a frequent gym goer so I understand if I got this wrong.
Genes are crazy.I only have a small but fortunate gene mix. Due to my mom being completely white and full of freckles and my dad being north african (barbary tribe, so 12000 years of adjusting to the sahara and regions around it) and me being born in Denmark and growing up there, I can tolerate very cold weather. At 0 degrees, if I have a sweater on, I'm sweating... BUT at the same time, when I am in a warmer climate my skin tone will adjust all the way and I won't get sun burnt until 50 degrees celsius.
The thing about life expectancy is a bit distorted. Yes, there were more younger deaths earlier in history, but most of them were at a very young age (young children) and countered by higher birth rates. - It doesn't devalidate the point of there being natural selection (children dying from some germs, thus potentially breeding a higher resistance to it in the survivors), but makes the impact seem more profound than it is.
And that's a lot less of an issue with vaccinations and modern medicine. We're evolving into half-blind, lower intellect, sacks of substandard parts due to the species' ability to overcome our genes. The weak are living long enough to pollute the gene pool. And, yes, I've worn glasses since I was a child. I'm one of them.
Yeah when they say that people lived into their 30s on average, keep in mind that if you had a population of two people, one who dies at 3 and the other at 73, the average age at death is 38 - even though nobody died anywhere near that age.
Vive la difference! On that thumbnail. About 10 years ago one of my kids gave me a book called "The Live Earth Global Warming Survival Handbook". The last section addressed what to do if all else failed. It's titled Evolve. A couple of the physiological changes it mentioned were scaly/bumpy skin and green skin pigmentation. Respectively, for better moisture retention, and potential photosynthetic adaptations.
"I'm in peak condition" "I never go viral" "Reindeer? More like snowdeer" Something tells me whoever wrote these waited their entire life just to write them.
"still evolving" always cracks me up. Like, evolution isn't some event that occurs every once in a while. It's a continuous thing that never stops. It's like asking if the sun is still shinning.
Do you think if more humans move into space and colonize planets like Mars, we will start to be affected by natural selection again? Or do you think our technology will prevent/reduce it?
More humans won't live in space unless we develop technology to prevent natural selection caused by the hostile environment. We aren't going to have a ton of babies die off planet while we hope natural selection solves the problems for us.
As soon as the martian environment begins to have power on which kid gets to live or not to adulthood (which I think is very probable, considering the harsh conditions of living there), natural selection will be taking action on martian humans. These conditions can be really hard to control technologically, like the martian gravity. However, I believe natural selection won't be the only hard issue we'd have to face. Genetic drift would have a large impact, as the populations would be very small, especially if there isn't much genetic exchange between them and earthlings.
If we do try to colonize Mars or other planets, I think we'll probably bio-engineer the settlers to make their bodies more adapted to the local environnement. Water world ? Grow some gills ! Frozen world ? Make your body less susceptible to cold ! ...
To be clear, we are still subject to natural selection even though we've mostly sidestepped some of the more obvious selection pressures. To the point that if we cloned earth down to the atom, put it on the other side of the sun-assuming a scenario where that doesn't bork the entire solar system's gravitational equilibrium-somehow keep technological parity, eliminate extinction events, etc... then run the clock forward, we'll still eventually become distinct species.
Great video touching on neutral evolution Joe and team!! I made a video about it on my channel too :) Sometimes we biologists get obsessed with adaptations but of course there’s a lot of randomness involved too. Life never ceases to surprise us, and we’ll never stop changing (unless we blow ourselves up).
@@dendroxden440 yep most people think religious people don't belive in evolution and that may be true but here I am Muslim and I believe in it so ya I guess humans are evolving to be more open to scientific ideas as we have more than just god to rely on
Overall a very interesting video, but the part about sexual selection applied to humans was a little weird. Irrespective of the fact, that I would even question the basic assertion, that exceptional intelligence is the major thing that is considered "attractive" in a reproductive sense for modern humans, - genetics also only have a limited influence on intelligence (besides the question of how you would even concretely define intelligence in the first place) and brain size, which is mentioned directly in the video as a potential beneficial trait, has a very limited influence on intelligence even within the limited genetic influence. Furthermore would higher sexual attraction alone in the case of humans not even directly lead to a genetic change in the population, as that is reliant on a higher number of surviving offspring. But more educated people (which does broadly correlate with common measures of greater intelligence) generally have a lower than average number of children, which would seem to severely hinder any effect of sexual selection and went oddly unmentioned in the video. As I said: I generally enjoed the video and it was a fun framework under which to explore different aspects and selective mechanisms of evolution - I just had some thoughts on that specific part of the video.
He chose intelligent as an example, but if you look at the current state of things, you know that there are plenty of people who do not choose based on intelligence. There's a movement among conservative Americans that is anti science and anti education, in their world view, getting educated is elitist. So those people are not choosing mates based on intelligence, and they are a large percentage of the American population. It's very upsetting that the future of humanity is being manipulated by politicians to become more submissive
The main reason well educated people have fewer children, is because they live in wealthier countries and having children is more of a financial liability as opposed to an investment. Poorer countries have many children because they work and contribute to the family, but also because they are more likely to not survive childhood. So they have a lower chance of survival which evens out the reproductive disparity.
@@jackoh991 Those things also happen within a single country, since poor and rich people don't have the same access to things like food, health care, education, safe neighborhoods and high paying jobs.
It's all fake science. Only an intelligence( like Man) ... makes, maintains, improves(evolves), & "fine tunes" ... abstract & physical Functions. All Functions ... PROCESS inputs into outputs ... have set purpose, properties, form & design ... and require "specific" matter, energy, space, time & Laws of Nature to exist & to Function. Law, mathematics & the scientific Method are ABSTRACT FUNCTIONS ... from the mind of an intelligence. Machines are PHYSICAL FUNCTIONS composed entirely of FUNCTIONS ... from the mind of an intelligence. Nature & natural processes can never make & operate the simplest of mechanical machines like a wheel, lever, wedge, spring, hammer, nail, screw, driver, nut, bolt etc. The three types of PHYSICAL machines are mechanical, electrical & .... molecular ( LIFE). All Life ... are physical Functions composed entirely of Functions. See. Abiogenesis & evolution are fake science that has fooled most for over 150 years. Science ( a function) relies completely on the fixed Laws of nature ( functions) for Man ( a function) to explain natural phenomena ( Functions). Everything in the Universe is either a abstract ( time, space, Laws) or physical ( time, matter) FUNCTION. Elemental particles, atoms, elements, compounds, molecules ... and ... chemical & nuclear reactions ... are physical Functions. Evolution is a physical Function. The Universe & Life ... was unnaturally made ... by a very very powerful intelligence( like an Almighty God). Religion is a natural phenomena because Man has always known the origin of Laws ( of Nature) and things ( of the Universe) with clear purpose, design & Function. A Religion simply believes it has identified the very very powerful intelligence that made everything. Atheism is also a religion which has replaced "the gods" with the ideologies, theories & fake science of "the Man." Either all of the religions are wrong ... or there is One ... that has correctly identified the "almighty" intelligence that made the Universe and explains why.
Evolution is continuous n will never stop. Even today you can see children n youth being very much smarter than the past generation. We see this in every aspect of population.
"Evolution does not necessarily reward intelligence. With no natural predators within the herd, it begun to simply reward those who reproduce the most and left the intelligent to become the endangered species. " - Idiocracy
Exactly what I was thinking. How many people choose a partner based on their intelligence? And how many good-looking, stupid people are breeding? Plus, intelligent people tend to have fewer children, just like in Idiocracy.
The Andean People have an adaptation. Their blood stream can catch and hold more oxigen per blood cell than any other human being, becouse they lived thousands of years over the andes, a place where The concentration of oxigen is very low.
i want to make a point here that human social environments are also environments overall, we are so attracted to this idea of nature x human that we tend to overlook that. maybe natural selection is just a name given to a phenomen that can happen in any sort of environment given enough outside pressure on individuals.
There's niche filling as well, kind of like the founder effect but more so naturally selected. I would imagine that for things like lower oxygen levels at higher altitudes, people that could make it up out of those that tried managed to get a living going in that area. It would also continue for each increase in altitude I'd imagine. And then natural selection by death would maintain the prevalence of the genetic traits.
I’m curious: I noticed that over time, humans’ average body temperature has changed to a lower value. I work at several places that require me checking in with a body temp reading since the start of the pandemic and I’ve glanced at the averages and it runs much cooler. I certainly have noticed it it my average from about 98.2 to a much chiller 97.6. This isn’t evolution, but what would scientists call this type of adaptation?
@@Chris-gr7ll Sure, but I’m talking about a thermometer reading from when I was in my twenties is warmer than it is today. By 1 degree. I’ve found this to be true for quite a lot of people. I’ve asked nurses about this and they’re saying the same thing.
I think maybe it's because of the climate change. Since the temperature around us keeps on rising, human body temperatures adapt to lower their temperature to prevent overheating. We adapt to better fit our environment. I think this is why this is happening, i'm just not that sure
The stated 98.6F isn't set in stone. Ppls' resting temps can vary from 97F to 99F and then on top of that vary another .9F depending on how active they were when the temperature was measured. If you temp was being recorded at 90F or something it'd be an outlier but 97.6F isn't.
Aging. I have noticed over my 50 years of veterinary practice, in dogs and cats (my patients) that younger animals have higher normal temperatures than older ones, usually by a degree or two.
Very interesting video, thank you. •At about 7 minutes you begin to show human variety of faces. Could you please check that university in Scotland that has discovered that the more faces you (digitally) combine the more beautiful the person looks? •On their website you can see this, they let you pick the faces to combine. It does not matter how ugly the faces are, if you combine enough of them, they will be amazingly beautiful. (Sorry I can’t remember the name of the university). •I believe that is because our sense of finding someone attractive is related to their degree of hybrid vigor. (Unlike being in-bred, which brings ugly looks, and the nasty effects of some mal-adaptive double recessives.)
This is just because people can be ugly in many ways, and when you average out these differences from the ideal, they will get closer and closer to that ideal. Symmetry is attractive, so when some people's face go left and others go right, then when you take an average, they will be centred, and thus more attractive. There really is no hybrid vigour in humans. Also, as typical, people ignore the other side of that coin which is outbreeding depression.
Great video! I think another great discussion in relation to the bit at the end of the video would be what the advancement of technology would look like in relation to the inherent wealth inequality that capitalism relies on.
I have a question about this. If the rate of mutation is the same, but environmental pressures are reduced, wouldn't the population's genetic variation increase?
Yes, that is the underlying assumption behind what he's saying around 7:15 - that the lowering of pressure won't make everyone more similar but may instead potentially increase diversity.
I guess variation depends on the environment. Since most humans in the near future will live in similar environments (the same sedentary lifestyle, the same medicine, almost the same food, the same activities, etc.), I think the genetic variation will decrease, but I am not an expert.
@@cristiantalero96 That isn't really how selection pressure works. Mutations just pop up randomly here and there in the genes of individuals in every population and if they don't cause death before reproduction, they accumulate in the inherited genes of that individual's descendants. That's how genetic variation actually starts, just accumulation of random mutations in a bloodline. Environmental pressure is usually caused by changes in that environment that favor or disfavor mutations. A drop in temperature may cause more thicker-furred mutants to survive winters and go on to reproduce while killing off furless mutants. A drought may favor mutants who need less water. Appearance of a new predator may favor longer-legged mutants. In all these cases, the mutations already happened BEFORE the environmental pressures came into effect. The pressure selects out some mutations while selecting in others. This is what scientists mean by environmental pressure effecting genetic variation. The pressure doesn't cause the variation itself; it just filters out mutations that go into the variation. When the environmental pressure disappears what happens is that the mutation filtering gets less effective. If the environment is largely the same for all individuals in a population and there are mechanisms to allow individuals to survive what would normally be deadly situations, then more mutations will escape the filters. The mutations are still happening all the time, randomly and at largely the same rates. However, mutations that would normally be disadvantageous don't get filtered out while mutations that would normally be advantageous won't result in higher survival (or reproduction) rates. For example, a rich person inheriting a genetic disease that would be fatal in other animal species may continue to live a normal life with medication and pass on that disease to multiple offspring. Conversely, a superman who could lift many more sacks of flour than his fellow laborers might pass on this super-strength to fewer offspring because he's poor. Unlike in animal populations where the former mutation would get selected out while the latter would get overrepresented, in humans both mutations persist in the gene pool of the population due to the "leveling" of environmental pressure. This is why increasing the comfort level of our environment will actually increase genetic variation, not reduce it.
You seemed to say that the large spleens the Bajau have will probably become less common in the future. Would this be true if the Bajau began to mix with many other people around the world? If one day everyone had a Bajau ancestor, wouldn't we all have larger spleens?
If the Bajau Spleen Gene (lol) becomes diluted with others, then it would most likely be something rather recessive genetically. I mean looking at a basic Punnet Square over time that gene becomes less and less likely to be passed down. So I believe what he said in the video is accurate. Unless an environmental pressure occurred for ALL of us to be selected for that gene then it would most likely disappear
I legit inherited both types of earwax, I sometimes have the thicker kind being annoying to clean, and then other times I'd have flaky ones to deal with lol, idk when earwax was brought up I thought having both types was interesting enough to bring up lol.
@@GTAVictor9128 lol, yeah I guess it's one of those more not really thought of questions, I mean I don't typically see people talk about ear wax on the regular or really at all except for when it's about ear health and hygiene lol
Yes! In the Philippines, Bajau are used as entertainment for some tourists since “Badjao” will dive when people drop money for them. They’re amazing peeps. They become blonde spending lots of times in the sea. Pity them though coz they get exploited in the Philippines.
Hi, hope everything goes well for you guys. Love all your videos 💖💖💖💖 Would it be possible for you to do WHY sugar can revive flowers? Or keep them look fresh longer? Whyyy
There are also small things still happening as well. Like, Blue Eyes. Apparently, Blue Eyes only emerged a couple hundred years ago. From 1 guy, who apparently got really busy, and everyone wanted to get with the mysterious stranger with the pale eyes
I feel more smarter people are avoiding to reproduce or limiting themselves to one only, may lead to reproduction towards other way around than mentioned.
don't worry, we are not getting idiocracy. the dumbest person is still smarter than the most clever monkey. and developments are made thanks to our ability to work together, not by one person doing all the work alone. we have more brain mass when combined than any single super genius.
but it proved all bets are off if you had an invincibility vaccine. well except china where covid still exists i guess for some reason. i think theyre just practicing martial law for the up and coming big party 3
My family on my father's side can all move their ears, unfortunately I only inherited control of my left ear. My father used to scare random kids that were crying out and about by walking over, pointing to his ears, and slowly moving them up and down. The kids would instantly stop and gawk, eyes wide mouths open, and then he'd wobble his ears rapidly back and forth, angle them up and down. Even the adults would wind up just staring in shock. Some people get some cool stuff.
Both of which are bad examples, because: A) we can't exactly detect true 'wet' and B) Snow BURNS when in contact with fire because sublimation At least, that's what I've learned.
I'm glad you immediately brought up the breath holding people of Pajau(sp?) Immediately. There's more examples, but it's localized. Yes we're still evolving, just not a global leap evolution, other than asperger's/autism which can arguably be considered us evolving, across the globe. I think the spectrum is our next leap, not a devolution.
It may be likely that prominence of a certain hair colour and eye colour in human populations was driven by sexual selection. For example, perhaps the earliest blue-eyed blonds were first considered exotic and desirable, leading to spread of those traits in Nordic countries. But elsewhere, those traits may have been considered freakish.
But also dark skinned people could not produce enough vitamin D to maintain fertility in northern latitudes, so blonds and gingers had a huge advantage in reproduction.
@@catdoctrigeek1464 Not really. Black skin is because of melanin. And it's affected by the equator and UV rays. As people migrated further away from the equator over the generations skin tone naturally lightened. This is actually a faster process then people understood previously. And it actually happens a lot faster based on who they mated with. It can happen as quickly as one generation. But for an entire population to lighten or darken it takes around 2500 years. Vitamin D deficiency is also much higher now that we are all inside all the time and wearing so much clothes.
6:05 but if it affects the rate of ear infections it can, via incapacitation, distraction by pain, distraction and mobility impairnent by vertigo, acute and chronic hearing impairment, etc; all that makes you likely to have an accident, lose out in group politics, or be identified as a good target by predators.
I'm definitely still evolving. This isn't even my final form!
Leave me a comment and let me know how weirded out you are by the future prospects for human evolution
1st
2nd
@@Gentlysix 2nd
3rd I guess
1st
In a lot of cases the Bajou people lose their hearing as they get older due to the constant diving under water. So they have this amazing ability to hold their breath under water for longer than anyone else but the constant pressure changes damage their hearing overtime so they essentially traded their hearing for the ability.
They just have to wait another 10.000 years until the fitting gene pops up
Interesting note. Trade-offs! It’s always a trade-off. Just a matter of finding them.
That’s super interesting.👍👍
Woah, maybe in far future they'll gain another ability to compensate the hearing lost
@@destinyhero4795 I’d bet against that as we have already evolved our technology to compensate for hearing loss.
Not just the Bajaus, the Orang Laut (we call them the Sekaks in my island) of Sumatran eastern coasts and the Mokens of southern Myanmar have this adaptation too. The Mokens even take it further. They can see clearly underwater without the help of goggles.
And they all share the exact same lifestyle. Only in different places.
Convergent evolution?
So they need diversity enrichment.
@@arved.jeltsch likely
@@arved.jeltsch I suppose it is... But there is one more thing they have in common that I forgot to mention. They're all Austronesians.
Interesting
5:50 I’m half Native American and half European, and this fact blew my mind. Some time in the past few years, my earwax changed dramatically. From what would be considered Native to European, according to this… My doctors seemed confused by it. Dormant genes somehow switched on due to age maybe? So weird.
It might be because your brain is working extra hard, overheating your earwax. Ever thought about wearing cooling fins on your head? Just a theory.
My earwax also changed in consistency as I aged. Yet I'm pretty sure that I have little to no European admixture.
You are the tenths among a hundred
You're all forgetting the relatively new understanding of epi-genetics. While acquired traits cannot affect your genetic makeup, your environment, or even the bygone environment of your parents, can influence what genes turn on or off and when. As one ages, it's entirely possible for a set of recessive genes to "switch on."
The same thing can happen with lactose intolerance; not everyone who suffers with it has had it from birth. It's common for someone to develop it in their mid-twenties.
Absolutely love "Civilization is filthy, y'all."
Truer words never said!
The LOSS of certain kinds of natural selection can also have an effect on our genetics! For instance, I've heard that the average size of babies' heads at birth is going up! It used to be that a baby with a big head could not fit through the birth canal, causing death for both child and (usually) mother. That was a natural selection pressure that kept the number of people with big-headed-baby genes low in the population. But now, with safe c-section births, these babies can be born! This means a larger number of people in the population can now have genes for big-headed babies.
Only a matter of time before we have M.O.D.O.K. babies lmao
interesting
The same could be said for any genetically related cause of death, really. As our medical interventions become more effective the number of people with the genetic predisposition that survive to have children will increase. Which will have a positive feedback effect.
@@mechanomics2649 Megamind babies seems more realistic though
ooohhh .. that explains anime and some comics/cartoons and the wobbling head figurines we put on our dashboards
"Humans die less"
Last time i checked the average death rate per person was still 1, i'm happy that they are improving on it.
Lol. Mortality rates are down. It is far more likely today than ever before that a baby born right now will grow up, have kids, and get to old age.
Hey, look at it this way: there's, like, nearly 8 billion of us who haven't died yet. That's out of only about 117 billion who ever lived, so the average death rate per person is really only 93%! Could be worse!
Humans die (young) less
Yes, I thought this was an odd statement to make, but from a certain point of view (credit Obi Wan Kenobi) it is true.
That's because you haven't cracked open your 1UP boxes yet.
I imagine a parallel universe were he just drowns at the beginning and the whole video is just him with he's head in the water bowl
What's D2O I breath good with that.
Oh god why would you make me think that?
Sir you have been deemed to be a risk factor in our society, please seek out a rehab facility immediately.
😂😂😂😂😂
haha....great imagery😆
If it wasn't for modern medicine, I probably wouldn't have survived my childhood. I spent a lot of time in hospitals and took lots of antibiotics as a child, and now I take a medication that saves my liver from inflammation and possible cancer, which actually ended up killing my grandmother who has the same liver disease. I wonder if medicine is allowing some genetic disorders to be passed on since more children survive?
Modern medicine has certainly allowed people to survive to reproductive age that would not have a century ago, but I'd say a minor downside to modern medicine. Take your own case. Are you fitter and healthier than most people? Are you more likely to successfully reproduce than a genetically 'normal' person?
I do know of cases where people have been diagnosed with a genetic disorder that either has effect after they reach adulthood or is recessive and have chosen not to have children or at least have any embryos screened. So it works both ways. And with the rapid advances in DNA tests, I'd be inclined to think modern medicine will gradually start to eliminate genetic diseases
@@AJPemberton Yes, that's true. We are checking for genetic issues before deciding to have children.
@@applegal3058 I'm not sure eugenics is what they're getting at lmao
@@mechanomics2649 oh ok...I don't mean eugenics. I mean, we're looking for diseases that can negatively impact a child, but I can see the ethics of even that. I guess I didn't read their comment well enough.
Realistically if there was no medicine there would be no weak offspring by you
This was a really good presentation. However it seems as if the topic(s) covered were rather broad. Could the production team consider going a little deeper on each of these sub points? Perhaps a small series all based on this one subject? I found myself fascinated with this and want to know more.
Well done! It’s almost as if you are trying to get people interested in the subjects you cover. Please - MORE! -
Yeah, it felt like a teaser! I want more!
I sent him a message on his Patreon account a while back, in which I gave him a reason why evolution is literally impossible. He even replied back to me, so I know for a fact he read it. My point for mentioning that, is he flat out lied to more than 300,000 viewers, and he assumes it's fine.
You shouldn't trust him, and need to double check his claims.
@@jippedgamer9723 what did he lie about?
@@jippedgamer9723 you're living proof that evolution is possible. Now shut up.
@@jippedgamer9723 Could please back up your claim? Why is evolution impossible?
So if a Himalayan has a kid with an Indonesian, that kid might be able to hold their breath for 16 min with little effort? Larger spleen + low oxygen breathing = “I only need to breathe once every 15 minutes?”
I believe that we are able to acclimatize to higher elevations or difrent temperature ranges overtime even without genetic variation.
Depends if its recessive or dominant, could be just as us if its inherits the small spleen of the Himalayan and the high oxygen breathing of the Bajau :)
*possibly*
As in, maybe not immediately, but maybe because of recessive genes, your grandchildren might have 1 or two of those genes
@@seanrea550 yeah but, i forgot the details, but theres a himilayan ethnic group that have very powerful breathing capacity, and their people dominate the amount of people who have hiked Everest. if you want more details go google
@@zy9662 Reminds me of Bernard Shaw's joke.
No we all evolve into crabs
Yknow I hate the probability of that.
We can't
That’s just crostations
😂
I wish
From what I've heard, milk drinking only evolved in humans once or twice. Most likely, most humans who can drink milk got that gene from a mutation shortly before Northern Europeans and Northern Asians split and then that gene spread more widely from there. But some think that it evolved in both Northern Europeans and Northern Asians separately after they split (I find that less likely, but I'm no expert).
And then much more recently, a population in Northern Africa developed a completely different mutation to dogest lactose. But that mutation hasn't had that much time to spread yet.
It evolved in what's called the Siberian Steppe, and it helped to spread far and violently across Europe, they're known as Aryans, Kurgani, or Yamnaya.
is that why so many black people are lactose intolerant
still doesn't explain why you will eventually be able to digest lactose when you expose urself enough to it. its not like u suddenly evolved new anti-milk genes or deleted something after you grew up. the tolerance to lactose changes depending on exposure. anything that is great for you will have some tolerance bs to ruin the fun
Interesting, can you link me an article to the merge of the gene in north Africa ??
So does that mean a lot of Africans can't drink milk?
The first thing I thought of as a cause for evolution is how many children we have. Couples who have more children are contributing more to the collective gene pool than those who have fewer children.
See Idiocracy the movie
Correct. That explains why the average height in the Dutch population hasn’t stopped increasing. The main reason there’s a positive correlation between the height of males and the size of their offspring. That is, the taller the male, the more numerous (on average) his offspring will be. And that isn’t because taller men are on average more fertile but because they have access to more resources to afford a more numerous offspring.
@ or look sexier to females
People who have more kids generally don't offer the best education, nurturing etc
I don't think that really contributes all that much to more populated areas like big cities since the offspring will just account for a smaller fraction of the population than if they were isolated in a small town. Granted, if their offspring continue to produce many offspring of their own over the course of several generations, we may beguin to notice more significant trends in the genetic drift of the overall population. Though, children that grew up in massive families tend to make smaller families of their own from what I've seen, so it's hard to tell if we'll ever see this phenomenon at a grand scale. Still interesting to think about nonetheless
The Bajao are known as good divers in my country. I did not know they have the genetic predisposition for working underwater. Thanks for the info. (Edit: should have bee genetic adaptation).
They don't have a genetic predisposition from working underwater. The genetic alteration came from them working underwater.
@@mechanomics2649 You just reiterated the same phrase in two different fashsions saying it wasn't lmao.
@@mechanomics2649 the predisposition can be an alteration.
I only discovered this channel recently after stumbling upon the crossover with SpaceTime and Eons on the origins of life- but I am now hooked. Great content presented in a fun and informative way. Thank you for all the hard work.
It doesn't hook me at all lol. He calls race evolution😂
I’ve evolved into a couch potato.
Edit: 7K likes? Mom, get the camera!
Same
i Am more like a bed potato
You _adapted_ into a couch potato.
@Don't Read My Profile Photo i won't np
Sofa potato*
If I know anything about evolution the thumbnail was a lie we will all evolve into crabs. Crab is inevitable.
So far that has only happened to invertebrates.
Humans are not only evolving but we are also moulding intelligence in other animals with whom we interact and pet, like dogs.
Dogs will become more and more intelligent as a result of our interactions with them.
Yeah makes sense
Depends on how you define "intelligence".
Dogs have evolved and are evolving to interact with humans better due to thousands of years of interaction with us. It is why most humans can almost naturally pick up on a dog's expressions and body language. Dogs are also more facially expressive than other animals because of their interaction with humans. Dogs have also learned to vocalise in a large variety of manners which other canids such as wolves and wild dogs cannot do because humans can instinctively pick up on such barks and vocalisations.
In terms of basic problem solving skills and memory wild dogs and wolves are just as intelligent, if not more in certain cases, than domestic dogs due to natural pressures and the need to be adaptive.
^ Found the dog.
It’s a gross misrepresentation by calling dogs animals that we interact with. We decide which dogs live, die and breed. Dogs are our toys, that’s the only reason for their existence.
@@jochem1986 but dog are literally animals, what do you want to call it a slave? jeez
When was the last time I was worried about getting eaten by a tiger on the way to lunch?
The last time I questioned whether or not I would survive the predators around me long enough to make it to lunch, was about a week ago. The predators I was worried about, were my fellow homeless people making their way to the food line.
@@dad1158 Obama phones with EBB (Emergency Broadband Benefits) are a thing... I'm homeless, not jobless, and some (not all) homeless do survive by leveraging a predatorial mentality. Does that help you understand? (Sorry I didn't actually read your comment, I just skimmed it. Battery low, charging opportunities aren't great and I have other things to do on my phone.) Come to portland and ask for Grant Imahara at The Blanche House (not a shelter just a place to get a free hot meal and I'll show you my camp if you don't believe I'm homeless. I work during lunch so look for me at breakfast or dinner feeding only.) I've been living it for over a decade. I'm not here to spread disinformation, I'm just retorting what the guy in the video said. The fact that some other homeless people are dangerous is not misinformation.
@@binaryglitch64 I don't know what that guy said, but I apologize on his behalf. I hope things work out for you.
@@binaryglitch64 the homeless situation will attract predators as well as encourage predatory behavior
@@mikethehunter5212 Honestly I don't remember either, but thanx for the sentiment.
( It was something like 'homeless people aren't dangerous, saying they are is spreading misinformation, I don't believe you that you're homeless.' )
@@kenneth9874 unfortunatly, this is all too true.
I wonder if sexual selection is also influenced by how sexual attraction is passed down as a trait in itself.
People who like a certain trait would be more likely to have kids with people who have that trait, passing down both the gene carrying the trait and the gene carrying their attraction towards it to their children. Given enough generations, people would just end up being attracted to those with the most similar traits(If sexual selection was the only factor and if sexual attraction was purely genetic. Neither of those are the case, but I am curious how much influence they would have)
Sexual attraction is mostly genetic.
Romantic attraction is more important in modern times.
Human females have two main criteria for a mate. His genetics and his physical and behavioral traits related to raising offspring. That is genetics and nurture.
Sexual attraction is basically attraction someone's genetics.
Romantic attraction, is attraction to the traits that made raising offspring more successful.
Humans raise offspring in pairs, and evolved to split that role between the two sex's.
The role of each sex requires specific traits. And it's those traits that humans are romantically attracted to.
For women, in general they are attracted to tall, strong, fit, ambitious, confident, charming, successful, experienced men. The majority of women are attracted to these things.
A study was done, mostly 10% of males are having sex with 80% of women. And those 10% of men overwhelmingly have the above traits.
Human females evolved to find a romantic partner, and then find a sexually attractive partner to be a sperm donor to secretly concieve offspring. Then bring it back for the romantically attractive partner to raise.
The sexual partner is good at genetics.
The romantic partner is good at nurture (providing and protecting).
Our behavior is heavily influenced by our genetics. No human can choose what they feel, want are attracted to, etc. It's chosen for us by our biology. And we mearly try hard to follow our "heart's desires" (it's really our biology's desires) and our biology "desires" the most optimal proliferation of our species.
Emotion is the biological mechsnism by which our biology influences our behavior toward optimal proliferation.
@@tylerdurden3722 bro are you a writer
@@great_channel no he just simply seeks the truth
There is a theory about that, it's called Fischerian runaway
@@tylerdurden3722 We found the incel
Its also highly worth mentioning that as of right now we can insert genes but with low specificity. CRISPR/Cas9 only allows us to cut at a certain place, insertion orientation is not assured. CRISPR/Cas9 DA allows us to change a nucleotide but has limitations and is still in it early phases. We WILL get to better gene editing but its a long road
I actually did a presentation for my Evolution course about a paper that talked about whether humans are still evolving. The general conclusion of the paper was that humans are in fact still evolving due to increased gene flow and decreased genetic drift -- which are important to maintain genetic variety -- due to an increase in movability and a larger population size. Of course, I would need to look into some other articles to see whether this one is entirely reliable, but it was an interesting find nonetheless.
Did you check the falsehood of "Hybrid Vigor"?
@@nosotrosloslobosestamosreg4115 the only info I see is about dogs and plants. Care to elaborate?
@@Youngnrrwhtjwtjetk Yeah. You should look for the case of hybridization done in India, Indian Lions + African Lions = a total disaster, sick and weak animals plus the reduction of Indian Lions. There is this study conducted in Oxford University regarding the disadvantages shown by """multirracial""" peopl, like bone marrow transplants/histocomaptibility, behavioural issues, besides the commitment in a mixed couple. I think my contact info is my google profile, if that's thec ase, email me and I will send you the paper. (I'm pretty confident I downloaded it)
@@nosotrosloslobosestamosreg4115 tell me you're racist without telling me you're racist
...
I feel like in the future something might happen with our eardrums them being able to tolerate more noise or something along those lines since people now and probably in the future are still gonna be using headphones constantly
That would only occur if people with weaker eardrums were dying before reproduction or having fewer children I think, which is not the case
Ok Lamarck
I read that as pants instead of plants on the evolutionary poster and was confused. Lol.
Great episode. The whole designer baby bit weirds me out. So much of our advancements aren’t natural, yet picking and choosing the traits we want our offspring to have off of a menu is ICK.
Perhaps if you didn’t refer to it as a “menu”, it wouldn’t sound so “ICK”.
People are already doing that.
People are choosing which partners they wanna mix genes with like it's a menu.
Certain traits, have always been attractive to women. Height, strength, fitness, confidence, charm, ambitiousness, assertiveness, etc. These are the ones mostly picked by women on the menu.
Humans have an ability to measure a person's genetic flaws. It's called Fluctual Assymetry. It's a fancy word for beauty. People partially figured out how the brain calculates beauty (it uses mostly ratio's and mirror comparisons, and they're working on the rest. A lot of it is not superficial. E.g. You're immune system plays a big role in how physically beautiful and individual appears.
I'm excited for the future of mechanically integrated humans, but I'm scared of what could be done by the people who own the patents for those technologies
It's already happening. I'm a trans guy and have been on HRT for just over a year and got top surgery. People are already modifying their bodies in ways never before possible. And there are already issues with supply chain and availability of this technology. (There is a near yearly testosterone shortage across Canada. A lot of people think that it's a manufactured scarcity in order to keep prices high. The cost of hormones does impact some people's ability to meet their transition goals.)
I don't think patents are going to be the issue. Rather cost and availability. I am hyper aware of the fact that being a trans guy in Canada my situation is very different than that of a trans person in say Russia or Uganda. As we further integrate technology with our bodies it's going to be the case (as it is now) of the haves versus the have nots.
There will always be people who can afford the technology both financially and politically. They will in turn have increased purchasing power and the cycle continues. As an example, trans people who are able to transition and pass have lower unemployment and better work outcomes. So being able to afford to medically transition leads to better financial situations.
@@CorwinFound right, those are certainly relevant issues as well, but I was thinking more neural implants and prostheses that are owned by corporations who now have direct access to your mind and body. Subscription models for prostheses, the sale of knowledge directly from your brain, advertisements in your own vision. And of course artificial scarcity and inflated prices for life saving technologies owned by private interests.
There's always the option of changing the way we look at patents, intellectual property. The option is just severely undervalued because it has fundamental implications on private entities. These things have way broader negative impact on society than people think. The price of a ton of drugs is inflated, most notably for HIV, the way the legislation is today takes part in the severity of USA's opioid crisis. The so called vaccine apartheid and the speed at which we face the pandemic, are also related in part to this.
I'm more scared about the capitalists who will abuse that tech for their own profit at all costs - just like what we see today. Of course, many of those capitalists will hold the patents
I've been telling my mother (75) for years that all she lacks is the red laser eye thingies. She's had two knee replacements, several vertebrae in her lower back fused with plates, two more in her neck fused with still more hardware and ~three~ shoulder replacements.
None of it is robotic, but at this point she's more aftermarket than OEM! 😆
I feel like, if we ever get really good an genetic engineering, that we could become something better than we are now. But it definitely won't be natural selection, but more so artificial. We very well could see superhumans at some point
I like to think of it as "deliberate selection" as opposed to "artificial selection". The things we do aren't somehow outside of the scope of nature; the natural world encompasses everything we can observe, including us.
Have you read “Origin in Death”, the murder mystery by J D Robb (aka Nora Robert’s)? Cloning for perfect women.
@@bartolomeothesatyr natural in this case means that it happens by itself, without premeditation, as a synonym of expontaneous.
If humans start cloning themselves instead of having babies, perhaps.. That has its own implications however.
Aaanndd welcome to our realization club that we still being halted in that department because of : 1 outdated ancient superstition 2. human right “ack”tivist bollocks (also caused by the issue no 1) for example that baby crispr experiment are being criticized and foiled by well.. you guessed which country that has 2 problems mentioned above...
My favorite part was when evolution said "It's carcanization time" and then carcanized over everyone.
I mean, technically into crab-like forms, not crabs-and it mainly concerns only crustaceans, but you get the point.
@@RuyVuusen Yes it's just a science joke.
@@aquetzalcoatl4663 Yeah, and I just explained it to the people who don't know the meaning of the word. It saves them the time of having to Google it.
@@RuyVuusen I'm sorry, I misunderstood your intent.
@@aquetzalcoatl4663 No problem, I do that too, at times.
I did my biology a level two weeks ago. And man, I knew it all before and could understand the whole video. Feel so smart!
People are definitely still evolving. Unfortunately, many people tend to conflate adaptation with evolution. Also, we are evolving much faster culturally than biologically. It wasn't so very long ago that the fashion was that men wore hats and powdered wigs. Cultural evolution proceeds much faster than biological evolution. Some ornithologists have observed cultural evolution in bird populations.
What do you mean when you say that evolution and adaptation tend to get conflated?
Genetic adaptation to an environment IS evolution, though evolution is not necessarily adaptive.
Is that what you meant?
@@blackoak4978 LGBTQ-Hating Hatepreachers (and other things...) run for Office + Congress right-now. If you can, vote Left;
the Telltale Atheist can list to you all the Problem-Politicans.
@@blackoak4978 I live in a place that has varied by about 140°F (78°C) ambient temperature depending on time of year. We have seasons, and as winter approaches, it takes a little while for my body to adapt to the new cold, and as summer approaches, it takes a little while for my body to adapt to the heat.
There are people living in environments that they have adapted to, but it's not due to differences in genetics, it's just within our existing tolerances as humans.
I think what the OP is saying, is people often mistake those adaptations for evolution (especially if it's more extreme than they are personally accustomed to).
Delusions of virtue is the real pandemic.
Here is a case where the proper use of terms is critical to clarity. An 'adaptation' is defined by biologists as a genetically determined trait contributing to an organisms 'fitness'. You personally are stuck with the genetic cards given to you by your parents. As such an individual can't evolve/change their adaptations. One CAN however become 'acclimatized' to changing environmental conditions within your genetic limits.
If we look back to evolutionary history, we will see that the majority of permanent changes were happening when the population of the given species was low.
Low population means, that any change will much more likely to spread amongst the predecessors. It also means that the circumstances are likely to be not optimal, and there is a real need for change.
Humans can survive as is very well without any change. So any beneficial mutation in anyone, will not spread out on large scale.
True, genetic drift is not likely to be a significant factor in humanity's evolution at this point. That might change if we end up nuking ourselves into annihilation (because the survivors will be back to the "low population" level), but barring that its unlikely. Even climate change isn't likely to do enough damage to the species as a whole to change that (or it will do all the damage if the worst predictions of runaway effects come true, but extinct species don't evolve either so same result).
But we _are_ still subject to "natural" selection. Its just not a selection based on nature - its a selection based on our technological developments. For example, humans are strongly adapted to use the sky's blue light to drive our circadian rhythm. Assuming we continue to use screens or some other light-producing analog to screens far enough into the future, that adaptation will have to change. We don't get enough natural sunlight and get too much artificial blue light to maintain this, and evolution will (eventually) figure that out for us.
Its a relatively small problem from an evolutionary perspective, so it'll likely take on the order of thousands of years before notable adaptation to having screens on all the time would evolve, but it will happen if we survive (and maintain our technological advancement) long enough.
On the other hand, there's a more compelling adaptation pressure: People are having kids later in life. Those who are capable of having healthy children into their 40s are going to have a fairly significant evolutionary advantage over those who can't as society continues to push toward having fewer children later in life. That amounts to an _extremely_ strong selection pressure and could easily drive adaptation across most of our species within a few centuries, barring a significant change in the way our economic and political systems function over that time frame. Of course its also an adaptation that wouldn't have an easily-recognizable phenotype, so the only way we'd even be able to measure the change would be to track the success rate of births in later life stages, but even then it'd be hard to separate evolutionary improvements vs medical improvements.
@@altrag I don't see why natural selection should incide on screen light and so on. Even if a specific gene arises, it doesn't select anything. Why should the individual with that gene have a better fitness?
But, you could be right about the late offpsring. A lot of people tend to have their kids in their late 30s and if they have some kind of serious health problem, they abort, so this is indeed a heavy natural selection.
Maybe in the future people will yes have a better reproduction even when they're older, but I think that a trade off wil arise. Maybe it will be that humans start to enter puberty later and so their reproductive cells start to deteriorate later. I don't how cool would be to enter puberty later 😅
@@BioTheHuman > Why should the individual with that gene have a better fitness?
Well that's the question now isn't it? There's a growing body of research showing that the blue light from all the screens around us is affecting our natural circadian rhythms, leading to poor sleep which in turn leads to a variety of negative health outcomes.
And if you can avoid negative health outcomes, then you will be, on average, a fitter person (in the genetic sense - your workout routine is a whole different topic).
Is that circadian rhythm disruption enough to trigger a selection pressure? I don't know. I just picked a random thing that I know happens to affect health outcomes in subtle but noticeable ways. There are any number of other things that could potentially trigger a selection pressure - tolerance for heavy metals as we continue to pollute our air and waterways. Better ability to notice and react to things at high speed (because we drive so much - fewer accidents). Body plans adjusted for longer periods sitting rather than being active.
I can't say for sure that any of those _will_ trigger a selection pressure, but any of them _could._ And likely would if our way of life remained relatively unchanged for a long enough timespan. On the order of a few thousand years, at least. Not something you or your children or even your grandchildren are likely to see just happen one day. Evolution can be "fast" in the sense that strong pressures can trigger adaptation over the course of a dozen or two generations, but that's far too long a timespan for any individual to notice the change. It can only really be noticed in retrospect (and only if there's sufficient knowledge about the lifestyles of both the older and current generations).
> I don't how cool would be to enter puberty later
No more or less "cool" than it is now. Again, such adaptations happen over multiple generations. Nobody's going to really notice if puberty slips two or three weeks on average over the course of a single generation - it'll just get chalked up to statistical variability. But if that repeats over 20 generations then you've pushed it back a year or so, while no single generation among those 20 could tell the difference.
So a scientist who decides to measure the average onset of puberty in 2500 and compare it against the data from 2100 will notice a fairly significant difference, even if they wouldn't have noticed when comparing against data from 2450 (assuming of course that we haven't invented some sort of new way of measuring things that's drastically more precise than our current statistical modeling, or are capable of genetically engineering ourselves to the point where such comparisons are meaningless or some such thing - 400 years might not be that long for evolution, but its a pretty massive jump for scientific innovation!)
I am a mutant. We found that my dads side of the family carried genes for extra muscle strands. Out of 3 sons, I was the one that inherited this gene which my brothers always found weird growing up.
No matter how much taller and more muscled they were, I was always in the same weight class and could always lift the same if not more than them. We finally found this out when I was 15 as without any previous weight training I was able to bench press 400 pounds in a competitive lifting challenge bet us, adding more and more weight each 20 reps I stopped there knowing that I could have gone higher but I would struggled passed it.
Later on when I was getting my body checked out on a completely unrelated note, they noticed my muscle looked weird and when they got back to me later, they told me that I had 15 more muscle strands per millimeter of muscle than normal people which not only makes me stronger but also makes me about 40-50 pounds heavier. Which is why I almost sink in water. Today after being starved at 16 and having a stroke at 17, I weight 210-220 pounds and I can still lift 300 pounds but I don't push myself anymore do to health reasons caused by the stroke.
This isn't my only mutation however as I also have color changing eyes which contain green, brown, blue, yellow, and orange colors.
I also have an extreme metabolism which causes me to lose up to 11 pounds a day if I'm working. When I first caught covid, I was quarantined to my bedroom, my sister was told to feed me but she only fed me one PB&J every other day and I was sick for a month in a half.
Around the end of that my mother started to feed me because I came out and explained I was starving as despite the fact I was laying down all day not doing anything except fighting covid, I lost 32 pounds which at the time put me at 150 pounds and I looked like a Skeleton. Now I am a little taller, I'm still mostly muscle but always have a little gut because if I don't, a days work is horrible on my body.
You did the 400 pounds for 20 reps?
@@basedostrich did I use the wrong word, or do you not believe me? If Reps means to lift 400 pounds all the way up above my chest and back down just above my chest before doing it again 20 times, then yes it was twenty reps.
If reps means something else than I understand your confusion and that would be proof I didn't do frequent work outs. I wasn't a frequent gym goer so I understand if I got this wrong.
@@deadman9335 between being unbelievably impressive and a coma separating 400 pounds from 20 reps I wasn't sure is all.
Genes are crazy.I only have a small but fortunate gene mix. Due to my mom being completely white and full of freckles and my dad being north african (barbary tribe, so 12000 years of adjusting to the sahara and regions around it) and me being born in Denmark and growing up there, I can tolerate very cold weather. At 0 degrees, if I have a sweater on, I'm sweating... BUT at the same time, when I am in a warmer climate my skin tone will adjust all the way and I won't get sun burnt until 50 degrees celsius.
@@LeegallyBliindLOL this is very interesting and cool
Mark Zuckerberg on the thumbnail.
bruhh 💀
bruhh 💀
As a wise man once said “It about time for my workout”
I’ve been asking the same question.
Thanks for answering it.
I've always wondered about the question! Thanks for making a video on it.
The thing about life expectancy is a bit distorted. Yes, there were more younger deaths earlier in history, but most of them were at a very young age (young children) and countered by higher birth rates. - It doesn't devalidate the point of there being natural selection (children dying from some germs, thus potentially breeding a higher resistance to it in the survivors), but makes the impact seem more profound than it is.
And that's a lot less of an issue with vaccinations and modern medicine. We're evolving into half-blind, lower intellect, sacks of substandard parts due to the species' ability to overcome our genes. The weak are living long enough to pollute the gene pool. And, yes, I've worn glasses since I was a child. I'm one of them.
Yeah when they say that people lived into their 30s on average, keep in mind that if you had a population of two people, one who dies at 3 and the other at 73, the average age at death is 38 - even though nobody died anywhere near that age.
This whole video answers a question I have been asking myself (and my friends) for maybe 5 years. I was only missing the genetic drift 😌 thank you
I don't know about us but
Joe is evolving.
He is way more funnier than he used to.
One if not only the science channel that I watch getting good laughs out of while learning
He's so powerful
Who's joe
@@devanloa This content creator's name
Jway
Vive la difference!
On that thumbnail. About 10 years ago one of my kids gave me a book called "The Live Earth Global Warming Survival Handbook". The last section addressed what to do if all else failed. It's titled Evolve. A couple of the physiological changes it mentioned were scaly/bumpy skin and green skin pigmentation. Respectively, for better moisture retention, and potential photosynthetic adaptations.
as a person living in sabah, malaysia
bajau people do live in our state, and they're very good!
im bajau but the darat one hahah
"I'm in peak condition"
"I never go viral"
"Reindeer? More like snowdeer"
Something tells me whoever wrote these waited their entire life just to write them.
The speech bubbles in this video are a riot. LOL Whether they should become a common occurrence in these videos, I don't know, though.
Perfect timing. We are learning about evolution in my bio 2 class right now and I've been wondering about this
It’s funny that you talked about the people who can hold their breath because I was literally talking about them 2 hours watching this.
"still evolving" always cracks me up. Like, evolution isn't some event that occurs every once in a while. It's a continuous thing that never stops. It's like asking if the sun is still shinning.
But the sun will stop to shine. One day.
Do you think if more humans move into space and colonize planets like Mars, we will start to be affected by natural selection again? Or do you think our technology will prevent/reduce it?
More humans won't live in space unless we develop technology to prevent natural selection caused by the hostile environment. We aren't going to have a ton of babies die off planet while we hope natural selection solves the problems for us.
As soon as the martian environment begins to have power on which kid gets to live or not to adulthood (which I think is very probable, considering the harsh conditions of living there), natural selection will be taking action on martian humans. These conditions can be really hard to control technologically, like the martian gravity.
However, I believe natural selection won't be the only hard issue we'd have to face. Genetic drift would have a large impact, as the populations would be very small, especially if there isn't much genetic exchange between them and earthlings.
If we do try to colonize Mars or other planets, I think we'll probably bio-engineer the settlers to make their bodies more adapted to the local environnement. Water world ? Grow some gills ! Frozen world ? Make your body less susceptible to cold ! ...
@@metametodo There isn't much genetic exchange between me and other earthlings *now* .
To be clear, we are still subject to natural selection even though we've mostly sidestepped some of the more obvious selection pressures. To the point that if we cloned earth down to the atom, put it on the other side of the sun-assuming a scenario where that doesn't bork the entire solar system's gravitational equilibrium-somehow keep technological parity, eliminate extinction events, etc... then run the clock forward, we'll still eventually become distinct species.
This video helps me study for my Biology test, thanks man!
Thanks for all the great videos you folks produce!
Who let Mark Zuckerberg on the thumb nail?
Great video touching on neutral evolution Joe and team!! I made a video about it on my channel too :) Sometimes we biologists get obsessed with adaptations but of course there’s a lot of randomness involved too. Life never ceases to surprise us, and we’ll never stop changing (unless we blow ourselves up).
neutral?
@@Faustobellissimo the stuff on the founder effect/evolution in isolated populations comes under the umbrella of genetic drift.
I just hope people evolve to accept evolution to begin with
Bro this ain't 2008, do you live in some cultist enclave or something?
@@Tarik360 I've still seen tons of people who don't believe in it
@@Tarik360 have you ever been to America lol
@@dendroxden440 yep most people think religious people don't belive in evolution
and that may be true but here I am Muslim and I believe in it so ya I guess humans are evolving to be more open to scientific ideas as we have more than just god to rely on
So, conclusion is that we r still evolving but most people not accept because of religion..... So horrible....
Great topic. I have wondered about this for awhile, so thanks for this.
I'm new to this channel, but he called me a smart person. I'm subscribing.
Overall a very interesting video, but the part about sexual selection applied to humans was a little weird. Irrespective of the fact, that I would even question the basic assertion, that exceptional intelligence is the major thing that is considered "attractive" in a reproductive sense for modern humans, - genetics also only have a limited influence on intelligence (besides the question of how you would even concretely define intelligence in the first place) and brain size, which is mentioned directly in the video as a potential beneficial trait, has a very limited influence on intelligence even within the limited genetic influence.
Furthermore would higher sexual attraction alone in the case of humans not even directly lead to a genetic change in the population, as that is reliant on a higher number of surviving offspring. But more educated people (which does broadly correlate with common measures of greater intelligence) generally have a lower than average number of children, which would seem to severely hinder any effect of sexual selection and went oddly unmentioned in the video.
As I said: I generally enjoed the video and it was a fun framework under which to explore different aspects and selective mechanisms of evolution - I just had some thoughts on that specific part of the video.
He chose intelligent as an example, but if you look at the current state of things, you know that there are plenty of people who do not choose based on intelligence. There's a movement among conservative Americans that is anti science and anti education, in their world view, getting educated is elitist. So those people are not choosing mates based on intelligence, and they are a large percentage of the American population.
It's very upsetting that the future of humanity is being manipulated by politicians to become more submissive
@@izzyxblades Not the future of humanity, just the future of america.
The main reason well educated people have fewer children, is because they live in wealthier countries and having children is more of a financial liability as opposed to an investment. Poorer countries have many children because they work and contribute to the family, but also because they are more likely to not survive childhood. So they have a lower chance of survival which evens out the reproductive disparity.
@@jackoh991 Those things also happen within a single country, since poor and rich people don't have the same access to things like food, health care, education, safe neighborhoods and high paying jobs.
It's all fake science.
Only an intelligence( like Man) ... makes, maintains, improves(evolves), & "fine tunes" ... abstract & physical Functions.
All Functions ... PROCESS inputs into outputs ... have set purpose, properties, form & design ... and require "specific" matter, energy, space, time & Laws of Nature to exist & to Function.
Law, mathematics & the scientific Method are ABSTRACT FUNCTIONS ... from the mind of an intelligence.
Machines are PHYSICAL FUNCTIONS composed entirely of FUNCTIONS ... from the mind of an intelligence.
Nature & natural processes can never make & operate the simplest of mechanical machines like a wheel, lever, wedge, spring, hammer, nail, screw, driver, nut, bolt etc.
The three types of PHYSICAL machines are mechanical, electrical & .... molecular ( LIFE).
All Life ... are physical Functions composed entirely of Functions.
See. Abiogenesis & evolution are fake science that has fooled most for over 150 years.
Science ( a function) relies completely on the fixed Laws of nature ( functions) for Man ( a function) to explain natural phenomena ( Functions).
Everything in the Universe is either a abstract ( time, space, Laws) or physical ( time, matter) FUNCTION.
Elemental particles, atoms, elements, compounds, molecules ... and ... chemical & nuclear reactions ... are physical Functions.
Evolution is a physical Function.
The Universe & Life ... was unnaturally made ... by a very very powerful intelligence( like an Almighty God).
Religion is a natural phenomena because Man has always known the origin of Laws ( of Nature) and things ( of the Universe) with clear purpose, design & Function.
A Religion simply believes it has identified the very very powerful intelligence that made everything.
Atheism is also a religion which has replaced "the gods" with the ideologies, theories & fake science of "the Man."
Either all of the religions are wrong ... or there is One ... that has correctly identified the "almighty" intelligence that made the Universe and explains why.
This dude explained evolution extremely well in my opinion
Excellent exploration of evolution! I'm so glad I'm predisposed to watch these kinds of videos. You're awesome!
Evolution is continuous n will never stop. Even today you can see children n youth being very much smarter than the past generation. We see this in every aspect of population.
"Evolution does not necessarily reward intelligence. With no natural predators within the herd, it begun to simply reward those who reproduce the most and left the intelligent to become the endangered species. " - Idiocracy
Exactly what I was thinking. How many people choose a partner based on their intelligence? And how many good-looking, stupid people are breeding? Plus, intelligent people tend to have fewer children, just like in Idiocracy.
@8:11 "Sexual Selection" aka "Survival of the Sexiest"
Yes basically.
Random gene fact: being able to become a furry is a genetic thing
Angela Merkel was a ruthless dictator indeed 👎 🤮 ❌ 🚫 ❌ 🚫 ❌ 👎 @@matthewboire6843
The Andean People have an adaptation. Their blood stream can catch and hold more oxigen per blood cell than any other human being, becouse they lived thousands of years over the andes, a place where The concentration of oxigen is very low.
This feels like a summary of everything I learned in 7th grade science
i want to make a point here that human social environments are also environments overall, we are so attracted to this idea of nature x human that we tend to overlook that. maybe natural selection is just a name given to a phenomen that can happen in any sort of environment given enough outside pressure on individuals.
Of course we're still evolving. Everything evolves. Some faster, some slower but everything evolves.
There's niche filling as well, kind of like the founder effect but more so naturally selected. I would imagine that for things like lower oxygen levels at higher altitudes, people that could make it up out of those that tried managed to get a living going in that area. It would also continue for each increase in altitude I'd imagine. And then natural selection by death would maintain the prevalence of the genetic traits.
Joe there!!! Thanks for using the term “folks”. And thanks for everything else :3
I’m curious: I noticed that over time, humans’ average body temperature has changed to a lower value. I work at several places that require me checking in with a body temp reading since the start of the pandemic and I’ve glanced at the averages and it runs much cooler. I certainly have noticed it it my average from about 98.2 to a much chiller 97.6. This isn’t evolution, but what would scientists call this type of adaptation?
I would imagine that you're not getting core temperature which would be higher
@@Chris-gr7ll Sure, but I’m talking about a thermometer reading from when I was in my twenties is warmer than it is today. By 1 degree. I’ve found this to be true for quite a lot of people. I’ve asked nurses about this and they’re saying the same thing.
I think maybe it's because of the climate change. Since the temperature around us keeps on rising, human body temperatures adapt to lower their temperature to prevent overheating. We adapt to better fit our environment. I think this is why this is happening, i'm just not that sure
The stated 98.6F isn't set in stone. Ppls' resting temps can vary from 97F to 99F and then on top of that vary another .9F depending on how active they were when the temperature was measured. If you temp was being recorded at 90F or something it'd be an outlier but 97.6F isn't.
Aging. I have noticed over my 50 years of veterinary practice, in dogs and cats (my patients) that younger animals have higher normal temperatures than older ones, usually by a degree or two.
Very interesting video, thank you.
•At about 7 minutes you begin to show human variety of faces. Could you please check that university in Scotland that has discovered that the more faces you (digitally) combine the more beautiful the person looks?
•On their website you can see this, they let you pick the faces to combine. It does not matter how ugly the faces are, if you combine enough of them, they will be amazingly beautiful. (Sorry I can’t remember the name of the university).
•I believe that is because our sense of finding someone attractive is related to their degree of hybrid vigor. (Unlike being in-bred, which brings ugly looks, and the nasty effects of some mal-adaptive double recessives.)
This could explain why there are so many gorgeous mixed race women.
This is just because people can be ugly in many ways, and when you average out these differences from the ideal, they will get closer and closer to that ideal. Symmetry is attractive, so when some people's face go left and others go right, then when you take an average, they will be centred, and thus more attractive. There really is no hybrid vigour in humans. Also, as typical, people ignore the other side of that coin which is outbreeding depression.
@@Bridge2110
People can be ugly in many ways ...
Dude, I like you
Great video! I think another great discussion in relation to the bit at the end of the video would be what the advancement of technology would look like in relation to the inherent wealth inequality that capitalism relies on.
I would love evolve into that
I have a question about this. If the rate of mutation is the same, but environmental pressures are reduced, wouldn't the population's genetic variation increase?
Yes, that is the underlying assumption behind what he's saying around 7:15 - that the lowering of pressure won't make everyone more similar but may instead potentially increase diversity.
I guess variation depends on the environment. Since most humans in the near future will live in similar environments (the same sedentary lifestyle, the same medicine, almost the same food, the same activities, etc.), I think the genetic variation will decrease, but I am not an expert.
@@cristiantalero96 That isn't really how selection pressure works. Mutations just pop up randomly here and there in the genes of individuals in every population and if they don't cause death before reproduction, they accumulate in the inherited genes of that individual's descendants. That's how genetic variation actually starts, just accumulation of random mutations in a bloodline. Environmental pressure is usually caused by changes in that environment that favor or disfavor mutations. A drop in temperature may cause more thicker-furred mutants to survive winters and go on to reproduce while killing off furless mutants. A drought may favor mutants who need less water. Appearance of a new predator may favor longer-legged mutants. In all these cases, the mutations already happened BEFORE the environmental pressures came into effect. The pressure selects out some mutations while selecting in others. This is what scientists mean by environmental pressure effecting genetic variation. The pressure doesn't cause the variation itself; it just filters out mutations that go into the variation.
When the environmental pressure disappears what happens is that the mutation filtering gets less effective. If the environment is largely the same for all individuals in a population and there are mechanisms to allow individuals to survive what would normally be deadly situations, then more mutations will escape the filters. The mutations are still happening all the time, randomly and at largely the same rates. However, mutations that would normally be disadvantageous don't get filtered out while mutations that would normally be advantageous won't result in higher survival (or reproduction) rates. For example, a rich person inheriting a genetic disease that would be fatal in other animal species may continue to live a normal life with medication and pass on that disease to multiple offspring. Conversely, a superman who could lift many more sacks of flour than his fellow laborers might pass on this super-strength to fewer offspring because he's poor. Unlike in animal populations where the former mutation would get selected out while the latter would get overrepresented, in humans both mutations persist in the gene pool of the population due to the "leveling" of environmental pressure. This is why increasing the comfort level of our environment will actually increase genetic variation, not reduce it.
@@andrewsuryali8540 Interesting. I didn't know about the mutations happening regardless of the conditions of the environment.
Thanks for the info.
You seemed to say that the large spleens the Bajau have will probably become less common in the future. Would this be true if the Bajau began to mix with many other people around the world? If one day everyone had a Bajau ancestor, wouldn't we all have larger spleens?
If the Bajau Spleen Gene (lol) becomes diluted with others, then it would most likely be something rather recessive genetically. I mean looking at a basic Punnet Square over time that gene becomes less and less likely to be passed down. So I believe what he said in the video is accurate. Unless an environmental pressure occurred for ALL of us to be selected for that gene then it would most likely disappear
“As humans live longer, die less..”
I’m dead 🤣
Apparently, not yet…..
The only example of genetic drift I heard of in my Anthropology course was in Eskimos, who had been estranged from the general population.
Ofc we ae still evolving, how else will we reach the Crab stage?
🦀
I legit inherited both types of earwax, I sometimes have the thicker kind being annoying to clean, and then other times I'd have flaky ones to deal with lol, idk when earwax was brought up I thought having both types was interesting enough to bring up lol.
I wasn't even aware other forms of earwax existed until watching this video.
@@GTAVictor9128 lol, yeah I guess it's one of those more not really thought of questions, I mean I don't typically see people talk about ear wax on the regular or really at all except for when it's about ear health and hygiene lol
Yes! In the Philippines, Bajau are used as entertainment for some tourists since “Badjao” will dive when people drop money for them. They’re amazing peeps. They become blonde spending lots of times in the sea. Pity them though coz they get exploited in the Philippines.
0:10 Move over Guybrush Threepwood!
Hi, hope everything goes well for you guys. Love all your videos 💖💖💖💖
Would it be possible for you to do WHY sugar can revive flowers? Or keep them look fresh longer? Whyyy
With great power comes great responsibility, but as humans have proven pretty much everywhere, power is also easily abused.
Im 23 alrdy and i love this channel so much.
There are also small things still happening as well.
Like, Blue Eyes.
Apparently, Blue Eyes only emerged a couple hundred years ago. From 1 guy, who apparently got really busy, and everyone wanted to get with the mysterious stranger with the pale eyes
was it that 7,000 year old Stone Age man? funny thing is my dad who’s from Brazil looks scarily similar to that guy
*starts out by making fun of transhumanism*
*continues to make THE case for transhumanism perfectly*
I feel more smarter people are avoiding to reproduce or limiting themselves to one only, may lead to reproduction towards other way around than mentioned.
don't worry, we are not getting idiocracy. the dumbest person is still smarter than the most clever monkey. and developments are made thanks to our ability to work together, not by one person doing all the work alone. we have more brain mass when combined than any single super genius.
It's not that they're smarter, it's that they're more educated.
@@glowingfatedie they're smarter dude
Great video, with lots of interesting stuff to think about.
PS: Is the M&M and Oreo thing an advertisement?
While natural selection has less of an effect, humans are not invincible - the last pandemic is just an example of that.
but it proved all bets are off if you had an invincibility vaccine. well except china where covid still exists i guess for some reason. i think theyre just practicing martial law for the up and coming big party 3
Good thing it got rid of a lot of the stupid people in the gene pool.
I was depressed and somehow this relieved me lol
Hey I got an idea on a topic. I ain't gonna say it tho.
@@ericparrish1515 lol
9:30 … we are heading for All Tomorrow’s 💀
Well that is not to bad just as long as you end up a asteromorph
My family on my father's side can all move their ears, unfortunately I only inherited control of my left ear. My father used to scare random kids that were crying out and about by walking over, pointing to his ears, and slowly moving them up and down. The kids would instantly stop and gawk, eyes wide mouths open, and then he'd wobble his ears rapidly back and forth, angle them up and down. Even the adults would wind up just staring in shock.
Some people get some cool stuff.
Asking "are humans still evolving?" Is like asking water if it's wet, or asking if snow will melt in a fire.
Both of which are bad examples, because:
A) we can't exactly detect true 'wet'
and
B) Snow BURNS when in contact with fire because sublimation
At least, that's what I've learned.
😂❤😂❤
Him: We are able to drink milk since we evolved differently from other animals.
Lactose Intolerant Me: Guess I'm a wolf then
Normal Humans: Please no
Furries: Yes please
😏
I'm glad you immediately brought up the breath holding people of Pajau(sp?) Immediately.
There's more examples, but it's localized.
Yes we're still evolving, just not a global leap evolution, other than asperger's/autism which can arguably be considered us evolving, across the globe. I think the spectrum is our next leap, not a devolution.
I love how furbies were used to represent what 'highly advanced lifeforms" would look like lol
The world evolves, therefore, humans will continue to evolve.
part of me always wanted to know how humans will evolve in future. but it never had courage to proceed. thanks for making this video.
🦀🦀🦀🦀🦀🦀
till a meteor hits and 2 unskippable ads start playing
Some surgeon out there is gonna put a giant animal spleen into a person:
It may be likely that prominence of a certain hair colour and eye colour in human populations was driven by sexual selection. For example, perhaps the earliest blue-eyed blonds were first considered exotic and desirable, leading to spread of those traits in Nordic countries. But elsewhere, those traits may have been considered freakish.
But also dark skinned people could not produce enough vitamin D to maintain fertility in northern latitudes, so blonds and gingers had a huge advantage in reproduction.
@@catdoctrigeek1464 Not really. Black skin is because of melanin. And it's affected by the equator and UV rays. As people migrated further away from the equator over the generations skin tone naturally lightened. This is actually a faster process then people understood previously. And it actually happens a lot faster based on who they mated with.
It can happen as quickly as one generation. But for an entire population to lighten or darken it takes around 2500 years. Vitamin D deficiency is also much higher now that we are all inside all the time and wearing so much clothes.
@@kellharris2491what are you smoking
6:05 but if it affects the rate of ear infections it can, via incapacitation, distraction by pain, distraction and mobility impairnent by vertigo, acute and chronic hearing impairment, etc; all that makes you likely to have an accident, lose out in group politics, or be identified as a good target by predators.
5:45 I am 50% European and 50% East Asian. So sometimes I have dry earwax, most of the time I have wet earwax.
Anyone knows how it's called the diagram showed around 10:02 ? Like a natural selection maze (or something like that lol).