Can We Actually Time Travel? Einstein Says 'Ja!'
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- เผยแพร่เมื่อ 31 พ.ค. 2024
- Episode 2 of 4
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"Next generation memory foam is layered with a patented comfort layer which gives your body contouring comfort and support, whilst keeping you cool - and with just the right amount of bounce."
With a deep understanding of time and relativity, traveling through time might actually be possible, according to Albert Einstein.
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Previous Episode:
Who Was The First Person To Time Travel?:
• Who Was The First Pers...
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What is the Second Law of Thermodynamics?:
www.livescience.com/50941-seco...
"The laws of thermodynamics describe the relationships between thermal energy, or heat, and other forms of energy, and how energy affects matter. The First Law of Thermodynamics states that energy cannot be created or destroyed; the total quantity of energy in the universe stays the same."
What Is Time? One Physicist Hunts for the Ultimate Theory:
www.wired.com/2010/02/what-is...
"One way to get noticed as a scientist is to tackle a really difficult problem. Physicist Sean Carroll has become a bit of a rock star in geek circles by attempting to answer an age-old question no scientist has been able to fully explain: What is time?"
What is time?:
earthsky.org/space/what-is-time
"Imagine time running backwards. People would grow younger instead of older and, after a long life of gradual rejuvenation - unlearning everything they know - they would end as a twinkle in their parents' eyes."
How Einstein's general theory of relativity killed off common-sense physics:
theconversation.com/how-einst...
"Gravity ties our bodies to planet Earth but it does not define the limits of the soaring human mind. In November 1915 - exactly one century ago - this was proven to be true when Albert Einstein, in a series of lectures at the Prussian Academy of Sciences, presented a theory that would revolutionise how we view gravity - and physics itself."
What is relativity?:
science.howstuffworks.com/scie...
"Let's heap a second scoop onto the relativity cone -- a lovely taste of Black Forest courtesy of German-born physicist Albert Einstein. As we just mentioned, Galilean relativity, even after it got a few tweaks from Newtonian physics, was broken."
Time Travel: Theories, Paradoxes & Possibilities:
www.space.com/21675-time-trave...
"Time travel - moving between different points in time - has been a popular topic for science fiction for decades. Franchises ranging from "Doctor Who" to "Star Trek" to "Back to the Future" have seen humans get in a vehicle of some sort and arrive in the past or future, ready to take on new adventures"
A question of timing:
www.physics.org/article-questi...
"From our everyday experience, the flow of time is a constant that relentlessly moves forward at the same pace for everyone. If you tell a friend you will meet them in an hour, you can both agree on how long that hour is."
What is a Wormhole?:
www.space.com/20881-wormholes....
"A wormhole is a theoretical passage through space-time that could create shortcuts for long journeys across the universe. Wormholes are predicted by the theory of general relativity. "
Yes, Time Travel Is Possible; Here's How:
gizmodo.com/yes-time-travel-is...
"Time travel's been one of man's wildest fantasies for centuries. It's long been a popular trend in movies and fiction, inspiring everything from Charles Dickens' A Christmas Carol to H.G. Wells' The Time Machine to the Charlton Heston shrine that is The Planet of the Apes."
Tipler Cylinder:
www.andersoninstitute.com/tipl...
"A Tipler Cylinder uses a massive and long cylinder spinning around its longitudinal axis. The rotation creates a frame-dragging effect and fields of closed time-like curves traversable in a way to achieve subluminal time travel to the past."
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DNews Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. DNews Plus is also offered as an audio podcast on Soundcloud.
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I think I watched this tomorrow.
Good idea, I'll watch it yesterday!
:D
nice one bro!
It seems like only yesterday today was tomorrow.
Or did you just think you thought you did?
Here is a quick explanation of entropie. Imagine your room is completly tidy. There is only one configuration for a tidy room. There is no dirt, Everything is on it's place, every change would make the room less tidy. Now if you think about an untidy room, there are a lot of possible configurations in which it can be untidy. Clothes can lie on the ground, or under the bed, there are a lot of possible configurations of how a pile of clothes can be stacked. Books are in the kitchen or in your bed. There are a lot of possibilities how a room can be untidy but only a few in which it can be tidy. Now if we assume there is some energy fluctuations in the room (like you) we can make a model in which the room randomly switches configurations and jumps from one state to another when time processes (This is not completly random, the process has a memory, but that does not matter (just make the time scale large enough)). The room will quickly end up in an untidy state, just because there are so much possibilites for it and there is only one possibility for a very tidy room, so it is incredibly unlickly that the room will get to a tidy state. Entropie is basically just a measurement for how many configurations the room can has (this is information). If the room progress from tidy to untidy we say entropie has increased because in an untidy state there can be a lot of configurations and in a tidy state only one. Let me know, if this explanation was somehow intuitiv and understandable.
Further information: You could argue that the tidy state is very unlikley but it is possible, so entropie could in theorie decrease although it is very unlikely. If can be shown that this indeed can not happen in a closed system. If this would happen, there would be energy needed from the outside which would affect the outside entropie so that total entropie still decreases. So yes, a brocken egg could spontaniously reassamble on your morning table, but that would still be a loss in total entropie
i don't get why it is called disorder.
if you see it from a probabilistic point then is just a sistem where probability is equality distributed among the posible events.
I walked in and farted... Entropy.
a guy who can't even spell ENTROPY trying to explain it.......ironic no?
A perfect example of entropy is headphones.theres only one way for them to be perfectly untangled but these motherfuckers mysteriously tangled themselevs behind my back...
We're travelling through time RIGHT NOW!.. just at a relatively constant rate and in one direction only.
I love your optimism! :-D
We're running on an endless, straight time-road facing backwards! :)
Isn't that a piece from Zen and the Art of Motorcycle Maintenance?
1 second per second.
1 minute per minute ;)
Time travel into the past simply is *not* possible. It will never happen without using more energy than already exists in the universe. Observing the past might be a different matter.
Well far in the future, just as we have in the past we will find exploits in physics. Who knows, if multiverses do exist to some extent, we could just collapse entire universes into energy as we need. How we do it would be beyond our thinking now. Like a bug looking into a mirror.
Brenden Carr
Sure. Collapse an entire universe. Genocide on an unfathomable scale just so Marty McFly can bang his girlfriend in the far off future year of 2015.
I sure hope your alternate self in the parallel universe isn't a quantum physicist working on the problem. I still haven't seen the rest of Jessica Jones.
+1acroyear1 u could just collapse a universe that has no life and no probablity of life ever popping up
Epicvampire800
A universe with zero life?
I suppose such a thing is possible if you catch it early enough. But how much energy would be required to scour an entire universe to check it for life?
Dude...
Everyone on the Planet can Observe the Past with Just their eyes and Nothing more..
We are growing much closer to both Traving at and multible C's....Plus time Travel in Both Directions....as we realise how to use different energys and better efficiency's
Stephen Hawking had an episode on time travel, focused on speed. Since something going fast experiences time slower. It showed a train as an example. The train went around the world extremely fast for years and when it stopped the people inside only aged a little but the people outside the train were much older.
Drinking game: take a shot each time he says "TIME"
*dead*
I drank bleach
Eyy how did I find you watching this click science garbage.
And yes I'm talkin to u petey
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No one ever seems to talk about the distances involved in time travel. Causality moves at light speed. so, if you want to travel from now to a year ago, you need to fly the distance travelled in space in your space ship + 1 light year's distance in time.
To go back a mere 8 minutes to your present location, you need to travel one astronomical unit in time, making the few kilometres the earth has moved seem a minor inconvenience in comparison.
Can you make a series on Dimensions ?
I second this motion
There are Many Levels of Dimensions..
Those that are Side dimensions of our plane..
Those of Different time lines..
Those born of even Fully Different universes.
Dimensions and Multiverse go Hand in hand..
Only Recently are we starting to get a Proper Understamding of it ( though Not quite yet )
I third this motion!!!!!
.
i can see in the 3rd dimension
Travelling forward in time is Relatively (pun intended) straightforward. Travelling backwards in time, if it ever becomes possible (which I seriously doubt due to the lack of concentrated negative energy in the universe) will only be possible to the moment the time machine was created.
i quite like the way time travel is done in steins;gate. you just jump from timeline to timeline. it allows you to avoid most of the more popular time travel paradoxs.
Go back in time and save my sorry ass please. The US needs my help again.
hahaha
booo!
Nah we need JFK
+Jade Palacios
We need a team up between JFK and Lincoln, a detective/CSI kind of show. Kennedy will be the hard drinking smooth-with-the-ladies loose cannon played against Lincoln's dry wit, by the book, straightman-who-ain't-so-straight persona. The running gags will be that every time there's a loud bang they immediately check their heads for damage, Kennedy has a phobia of convertibles, and Lincoln hates the theatre.
naw we need harambe
Youse need to use animations/ stuff that shows kinda what your talking about, a visual diagram??
Remember this is also a podcast so visual diagrams would put people who only listen to this at a disadvantage. And anyway it's just not their style i suppose
I watch these videos cuz i can be entertained whil looking away.for example before sleeping or while working out.
close your eyes and use your imagination
Learn how to visualise and process information your own way. This channel should not become a version of a children's book where animation is needed, listen and process, like the intelligent adult you are. No offence
+RUSEY BRAHHZZ Exactly what Karla said. If you hear of something you don't know, go and look in to it. You learn a lot more that way. Otherwise go to Sci Show.
we are traveling trough time all the time we are just going 1 second per second xD
Or 60 seconds per minute
or 60 minutes per hour
peasants..... I'm going with 24 hours / day. get on my level scrubs.
im going 365 days a year. GET ON MY LEVEL!!!! sometimes even 366.
+Arnaldonintendo im going 10 years per millenium!! wait...
This channel tho - i feel like a physicist when watching theses videos... You explain it so amazingly, but if possible, try using some animations when posssible, that would be amazing for us that actually sit and watch the whole video. Keep the science coming!
"If I'm going to build a boat I'm probably going to need to understand water" seems like a great anecdote for the counter argument. Creating a boat would be an excellent exercise in learning to understand water.
Entropy isn't really more complicated a concept than "disorder," "chaos," or "uncertainty." Personally I only find the thermodynamics definitions difficult to grasp because I don't have that background. Information theory examples however, seem much more straightforward. English text has a low entropy (uncertainty) because given the first letter in a word it is easy to guess the next (likely a vowel, 'e' is most common) as opposed to random letters (qcrnykp) which have no correlations between letters.
"The fourth dimension is not technically time." I'm not a phd student, but I thought I could define my own dimensions.
Are the two mouths at different points in time the same mouth? do they both exist at the same time?
Is the cylinder large or dense? which axis or a cylinder is vertical? Why do I need to travel around the cylinder when it's moving faster than I possibly could? wouldn't it be like using a drill bit on a lathe? Why does it have to be infinitely long? you said time was relative to speed and gravity, so what need is there for infinite gravity?
Wouldn't you need more mass than there exists in the universe to create two tubes that span it?
has any one researched if there are any living organisms already capable of time travel? usually in nature there a creature that fills nearly every niche. before we had boats and subs there were fish, before aircraft there were birds and insects, there are animals with night vision, and sonar ability. the tardigrades were found surviving in space on the ISS. so it makes me wonder if there is a creature maybe we haven't discovered it yet, that is capable of time travel. possibly a virus or bacterium.
hmm not that I know of but interesting question
Animals may have some neat abilities, but they're all feasible through biological processes. It'd likely be more likely to find a space animal with biological ion thrusters than an animal capable of time travel - the science of it is complex and possibly not even existent (barring near light speed time dilation effects). Plus, if an animal were capable of it, I highly doubt it'd be a bacteria or virus. Viruses are actually quite simple and not even considered to be alive. Bacteria are also very simple, organisms that small can do little more than sustain their own life. Bacteria or viruses don't have any of the air flight/night vision/sonar abilities.
Time travel? Not exactly but certain organisms can revert their cellular structures back to the way they were, basically being reborn (a type of jelly fish).
Yea us, you just havnt awakened your abilitys
awaken your ability to spell
Great job Trace! You really do your homework. On point brotha!
Einstein's original theory of relativity was if Chuck Norris kicks you, your relatives will feel it..
If I could go back in time, I would not click on this video.
Tuco Pacifico damn
Dnews! couldn't thank you guys enough! keep up the good work!😊
I was recently reading a sci-fi series (Star Carrier series by Ian Douglas if anyone is interested), with a device based on the idea of the Tipler Cylinder.
Obviously it's not really possible to create something of infinite length- the devices in the story were spinning, super dense cylinders of incredible mass with a finite length. The biggest change the author had made was that the cylinder is hollow, and travelling through space and time is achieved by flying through the cylinder. There are multiple cylinders (in the story it is unknown how many), and you travel between these cylinders, with the path you follow through the 'entry' cylinder determining where and when you end up arriving.
Purely out of interest, does anyone know whether this is pure fictional fantasy, or is this really a possible alternative to a Tipler Cylinder? Has a device like this been mentioned in any theoretical studies in IRL?
I ask because I'm constantly discovering things in sci-fi that is actually true, or is a real theory. For instance, I learned from this same series that the Omega Centauri globular cluster is thought to be the remains of a galaxy that was absorbed by the Milky Way.
I highly recommend the Star Carrier series by the way, especially if you prefer future-tech that you can believe may be possible based on current knowledge and theories.
For instance the 'grav-drive'- for sub-light travel ships are accelerated and manoeuvred by creating curvature in space using artificial singularities, allowing accelerations and manoeuvres that would be impossible using more traditional reaction-based drives due to inertia.
I'm not a PhD, I'm a lay person with an interest in the sciences, so if my question is naïve I apologize. Wouldn't traveling BACK in time, negate entropy? And, if this is true, time travel becomes much more complicated, as the fabric of the Universe would need to reverse/repair itself. Time travel, especially traveling back in time, would involve more than just the backward flow of time itself, but the reorganization of atoms into molecules and so on.
if you travel back in time, yes, according to your perception, entropy will negate. Which is a no no by the second law if thermodynamics, but for someone else, who isnt travelling in time, entropy will be normal. Yes, this certainly makes traveling back in time a bit messy. Special theory of relativity also states traveling back in time is impossible(you'll have to break the cosmological speed limit). What i believe is that even if traveling back in time were real someone, it should be made a cosmological crime.
+Jack Louis were real someday*
Louis Riehm You asked a really good question. I'm not a PhD either but here's an idea. If we go along with _"the past and the future exists simultaneously",_ so the future has already happened - these time "loops" (one going back in time) would already have happened and there wouldn't be much of a problem.
Or, travelling back, you could simply be observing that alternate reality (a branch of the time-tree/river of time) where you just happened pop into existence. If you're open minded, everything is possible - or at least open for discussion. :-)
What I think he means is that if person A would travel back in time, person B has no choise but to go back in time as well, because person B is just part of the universe that now has to reverse/repair itself back to negative entropy.
+stijn louis person b wont actually need to back in time. Going back in 'time' basically means experiencing the past events, but as time is relative , someone's past is your present(doesnt happen normally but is a possibility). In that case, you experience the event which someone else had sometime in the past. So you travelled back in time. If we take travelling back in time in this context, entropy doesnt get effected. But if you define going back in time as experiencing 'your' part happenings, in that particular scenario also, no other person is affected other than yourself, both of the past and the future and now entropy will start negating and you may change the future which further changes the entropy again and is a big chain reaction. For this kind of scenario to he omitted, a parallel universe is required. Which again, is theoretical physics
You have a very good way of breaking down stuff. Thank you for so much information
Trace, you're so likeable. It really helps people aproach intimidating scientific principles. Nice work!!
A TARDIS with an Einstein-Rosen bridge generator (Doctor Who theme song plays)
I personally don't think we'll be able to travel back in time. But I think that we may be able to travel forward in time somehow.
What do you mean personally it's a well documented theory
We already know that we can travel forward in time at different speeds than what we experience on Earth.
In a day or so, we will have traveled to tomorrow.
Ya just go stand around a huge body of mass like a black hole lol then come back and you'll be in the future
Possible? Sure it's possible given enough time and money just about anything is. Would we survive it? Nope, don't think we would.
We'd have to travel at the speed of light, perhaps more. Basic science says the faster we go the more gravity has an effect on us, so I figure if we were moving along fast enough to affect time as individuals in a noticeable way we'd be compressed down to something resembling a squishy pice of discarded bubble gum at some point during this acceleration curve.
Gravity so far has proven to be the most consistent force in all of creation, and we haven't figured out how to mitigate that to a significant degree yet.
i love this channel you guys are awesome!
I bet this guy will have motivation to make time machine and will go back in time and fix his video.
"I have no idea what frame dragging is, but let me tell you how this theory is wrong."
We can put the end of a wormhole on Earth and the other on a speed of light train. Then have the train run for 1000 years and when it stops it'll be the same age as it was but the other end will be normal time (year 3016). Now you can travel back 1000 years whenever you want!
Actually they won't travel back in time though, because the people on the train remained in the same timeline but the people on earth aged and so when the people on train will arrive they would have traveled to the future, but it isn't exactly the future as the time was still continuing on the earth itself and is a present time as they enter the earth for them as well
I feel like when they find out how to time travel In the future, the technology behind it won't be that great. like it will be a ''why didn't I think of that" moment lol
I'm with you buddy! 😂
My personal theory on time is that time is a straight line named t running along with a xyz graph. We can move in the 3d space but we are also moving in time. So we become like a stretched out line of moving (a world line) but we can only see specific moments in the 3d space (not the long stretched out line from the movement of time).
When we move quicker, time stretches for us so it takes a single second for us to move 3 feet, while it takes others (moving slower) three seconds to move three feet. If we were to stretch time enough we would start reversing it and instead compressing it so space stays the same while time gets smaller causing us to move backwards in time. Time would return to its proper scale once we stopped moving at a certain speed.
However, I don't think us travelling in time would impact anyone else's future just our own. It would just make our world line (how we move through time and space) change, however everyone else's world line would just stay independent and based on their actions.
This is almost certainly not how it works but its an easy way for me to understand it!
I thought the first law of thermodynamics was that we don't talk about thermodynamics......and the second law.......I've already said too much.
My theory about the possibility of time travel could work but has some holes. People are working on Teleportation right, where we can re-assemble molecules in another location... If this is done wirelessly, then maybe someone can send a space station or ship over to another planet or another solar system but make sure that the device only runs the sequence of code once it arrives to the location. Then re-assembly molecules to build the necessary scientists at that time, wherever they may be in the galaxy, even if it's thousands of light years away. The ships or stations could have solar power so that it has the ability to fully power down until it reaches an area with enough light power to boost it back up. This would be more of transferring the spirits of people to a new location and building them a body there through molecule assembly vs sending the living person there in an amount of time where humans cannot currently survive. Anyone have any elaborations on my idea?
This idea was briefly discussed in the world's science festival by Bill Nye (can't recall the year but the discussion featured DeGrasse Tyson, Brian Greene and many others, its on youtube look it up). It is a very good idea by the way. But the problem arises when we don't know yet how to transport information at greater speeds than that of light, also we havent figured out yet quantum entanglement, which would be a foundation of what you are saying. Also another implication would be that we would have to send the first generation of scientists the ol' fashion way, in order for them to build the nessesary machinery that would receive all quantum information to be rebuilt into you and me. Thus, even though machines would be essentially the ones rebuilding us up there, we would need a first generation of scientists over there to build such machines in the first place, which would paradoxically keep us from being able to perform such idea in the first place. We would have to find a way to help that first generation of scientists withstand millions of years of travel even if we are able to reach light speed. But the problem with that is that lets say we do create a way to withstand time travel, once that first generation of scientists reached their destination, here on earth our civilization may be long gone. There are many factors into considerarion. I recomend you watching that discussion panel though. They explain better than me.
was about to answer but Karla did an nice job explaining everything
+The Dro, It isn't "your theory", and it isn't correct.
Good Bud's theory.
Ying Yang Big Kipper Bang!
No mention of Kurt Godel's close-timelike-curves solutions (of General Relativity) on which the Tipler Cylinder (among others) was based?
Yes, why was there no mention of... whatever +Nikolaos Skordilis said?
That Godel, always the bridesmaid, never the bride....
+Esra Erimez yeah
I woulds like to hear your (Trace) idea about time travel. You appear to be a careful thinker not swayed by popular ideas.
You certainly represent MOST of the youth of today. I love learning from intelligent thinkers. Thanks.
Thanks for making these.
Everything in the universe is flying and rotating, so everything inside the universe is at different locations depending on time. And the Universe is also expanding. How can you have paths or worm holes inside the Universe, when everything inside the universe is flying and rotating, the universe is expanding, and what you are observing is not what you get, because you are observing things in space from hundreds, thousands, millions, billions years ago?
Predictions.
So, in other words, a time machine would have to move in space as well as time to get to where you want... many physicists have stated this....
Good point. Also, if I went back in time one month ago the earth was in a different position in its orbit around the sun. So I would wind up in space since, one month ago, the earth wasn't *here* yet.
This is probably why we don't see time travelers everywhere in our time, since location is also a concern. But then again, who knows, maybe people have figured out the formula for that...
This is probably why you'd want to be in a ship, in space, before attempting this. Also super advanced calculations to make sure you wouldn't end up inside of some other object when you emerged. And stuff.
You guys really need to number your videos.
Need to bring this series back
Love this series!
My theory is that time is an illusion. Past, present and future exist simultaneously. Our brains are time machines that decode time in a certain way. Think of a DVD player decoding a movie, it seems that it flows but that is really just an illusion the DVD creates, the whole movie existts on the disc all the time. So I think that in order to time travel we will have to alter how our brains work. OK back to work now.
that’s a real theory ,,, not yours
Good imagination
"What do we want?" "Time travel!" "When do we want it?" "That's irrelevant!"
"Frame dragging effect" this happens to everything if it is large enough and moves in Kerbal Space Program. First the fps slows down, then your craft seems to disapear into space time, then the game crashes.
Ohhhhhhhhhhh ok, this one made me way happy! And bonus points for the Trek reference!
Please make a video about the MULTIVERSE.
Can we like make a video on Tachyon and then time travel might be possible
For ppl who find the word Entropy confusing,The simple explanation would be every body/object in this universe tries to attend its thermal equilibrium which means every object will try to attend a steady state.A state in which there are no reactions or interactions.thus we can deduce that time keeps on moving in a single direction or in our perspective 'forward'
I'm just a 6th grader who LOVES physics and science. thanks a lot for this videos!!! it would be really helpful tho if you used graphs and charts to explain this but thank you very much!
Would this only create a parallel universe with the original universe still intact?
That's one of the many theories. Thus, if you killed your parents or grandparents back in time, you might just have an alternate timeline. Another possibility is that of the "Back To The Future" timeline concept.
Possibly, or if the universe is set on a certain course, it could be your "destiny" to do what ever you did when you time traveled. Futurama did an episode like that where Fry killed his great grandpa, he didnt fade out of existence, then accidentally became his own great grandpa.
That question would be meaningless for the time traveler, wouldn't it?
Ying Yang New Big Kipper Bang!
Time and Space inside the Abyss of Oblivion and the Anima and Animus inside the Angle of Dimensions. So no. The Old material Universe will become an Inferno...the New immaterial Omniverse(?) Multiverse(?) will be Paradise. The Old Universe looked real but never felt real. Suppose the New Omniverse to look unreal but feel very real...until it all renews itself again and that Inferno becomes a Big Bang after a Big Crunch occurs?! Who knows eh...???
No, there isn't enough energy in the entire universe to reverse entropy for the entire universe. Time is an illusory perception, the arrow of time deals with entropic change of a system and nothing more. It requires more energy to unscramble an egg than it does to scramble it, but by doing so, you're not traveling back in time, you're not reversing time for the scrambled egg.
"you're not reversing time for the scrambled egg" There is actually nothing in physics that proves this. As far as the egg is concerned if it becomes unscrambled it has literally traveled back in time.
Walking backwards would then be considered traveling back in time. As far as you're concerned, you're now back where you started.
See how silly that sounds?
Just because you can put something back the way it was does NOT mean time travel is involved.
James Gundlach There are a myriad of reasons why walking backwards doesn't constitute time travel. The most obvious of which is that the world continues to progress in the normal direction of time while you're doing so. Another obvous reason being that your brain continues to look in the same direction of time and knows you are walking backward.
If all particles in a system actually move in such a way that is completely identical to "backwards in time", it is literally indistinguishable from moving forwards in time. This is a known problem in physics. See "Illusion of time" by Briane Greene. The arrow of entropy is real, but the "forward flow" of time is an illusion. If you disagree, answer this question: How do you measure the rate at which time is flowing forward? How do you even measure the direction which time is flowing (forward instead of backward)?
Great, so it's agreed upon, if you input enough energy to unscramble an egg, no time travel has been involved.
We measure time arbitrarily is the answer to your question.
Direction of time is as you mentioned, an illusion. Things decay, this decay is perceived as a direction of temporal flow. In order for the egg to unscramble, you need to input energy back into the system to reverse it's decay into a scrambled state.
That is NOT time travel. For time travel to be valid, entropy needs to reverse for the entire universe. Good luck with that.
James Gundlach "In order for the egg to unscramble, you need to input energy back into the system to reverse it's decay into a scrambled state." Not necessarily. I was remarking how it could simply happen by chance. The most mind-blowing thing about the arrow of entropy, is that it's purely a statistical phenomenon. There's no physical law preventing an egg from unscrambling itself. It's a statistical law which states that it is extremely unlikely to happen. The chance everything we care about "appearing to flow backward in time" (indistinguishable from actually flowing backward in time) is low enough not to even take seriously, but it's there.
The way I time travel, I smoke a bowl, put on some chill music, and explore the past in my head in such detail with practice. Not what you'd expect, but everyone can do it! Minus the drugs, but just meditate on it, like daydreaming.
Nice topic Dnews
What if the speed of light is actually more of a universal speed limit?
perhaps light is infinite, but distance is not. maybe if there isn't a limit to speed bad things happen?
maybe this is already common knowledge I don't know, but what is limiting light's speed?
Theory of special relativity actually says so,
It explains or rather supposes that an object, message or any physical thing cannot travel faster than the speed of light, thus making the maximum achievable speed finite
its hard to explain here since the story is too long, but imo it should be impossible to travel back in time, while going further into time is quite easy with the gravity bends time idea..... also.... if you owuld go back in time, before the big bang, that would make a paradox right ? so i dunno about traveling back in time.
probably the way we percieve time is wrong, and with the bigbang problem of traveling back, that would mean if we could travel back in time, the multiverse theory or something else should be true too.
so there are so many thing that would implicate that traveling back in time should be nearly impossible.
Actually..
There is No...BIG BANG...
but rather little big bang..
Our Known / Realised universe is little more then a Tiny bubble amound Countless others..(the multiverse )
then within each bubble is also different levels or planes of existence..where Endless versions of our little bubble.. where anything that Could...in fact Has and Does Happen..
yet unseen or noticed by us..Due to our limited perceptions.
however...if one Goes back in time...and thus say..stops (even un knowinly ) ones grandparents from getting together...then upon returning to present...that traveler instead of returned to our realised reality...instead winds up in an alternet reality that thus gets around the Paradox issue...Yet to the traveler and those of the True as well as side realities...All seems Normal..
But if one were to travel back before the creation of our bubble ( known universe )..
would there be complete emptiness... or instead be on the opening of the blach hole that gave creation to our bubble universe ( the mispoken big bang...instead being that little big bang...
though that bang putting forth our existence...was everything thrust here through a White hole !!
then if we went so far back in time...to be on the black hole end of our Big bang ( the little big bang ) does the traveler get destroyed as they are sucked by the black hole..
interesting though
There is no before big bang. There is no nothing either (Not double negative). In order for nothing to exist, something would have ti exist. There would be less than nothing.
Actually..
there is a lot before what You term the Big bang
( which its reconised Not an Accurate description )
Now..with understanding we live exist Not in a universe
but a multiverse... Hense the Big Bang is Now known as the little big band or the big little bang...
Catch up..lol
Scientists tend to confuse themselves this is why I trust in god... cells know what to do without anything telling it what to do. Not everything can be proved by science, once we get to this subject all scientists do is assume
Daniel Deville Well, science can explain God as well in a plethora of ways that we may not even understand. One that comes to the top of my head is that God is a multidimensional being. We are 3 dimensional and are limited to experiencing reality in three dimensions and lower. If we moved into a two-dimensional reality, we would be gods because we could look down on the whole universe because we have depth.We could see all the people of Flat land and they couldn't conceptualize a third dimension. By this logic illustrated by Carl Sagan in Cosmos, God could be a 4-11th dimensional being who sees, feels, smells, tastes, and other unknown sensations all of time and can see everything in our universe due to his perspective. Think of it this way. If you see a cut out of an egg (2-d) YOU could see the chicken in the egg but two beings native to that universe couldn't. God can see inside the egg of a chick in our universe due to the extra dimensions he has.
I think being able to travel between dimensions is akin to time travel.....but that would be another episode, hey Trace?
My favorite theory for time travel is to amplify the back door particles used when quantum tunneling. Entangle two particles, amplify the tunnel of both, put one in a Bose-Einstein condensate (cold stuff to keep it near the present), Build a capsule 20 mins or 20 years later, then go almost back to the point when time travel was invented. Warning: Turn off Bose-Einstein condensate before leaving the capsule. Side Note: The more times you go back, the less distance back in time you have to go because you always have to turn off the condensate or you cannot retrieve what was sent.
Without getting into philosophical BS isn't every moving thing actually time-travelling?
Yes it is, though it's traveling into a fixed direction, it is infact time traveling.
He'll probably touch on that soon... Although he did explain that the time travel we are talking about is of science fictions.
When people say timetravel, they usually mean at rates different than the natural rate.
Yes...
You're someone who Actually gets it...Cool
You can "time travel" faster into the future or slower into the future, but you can't time travel into the past. Incidentally relativity says time travel into the past is the same thing as faster-than-light travel. If you can do one you can do the other.
1.21 GIGAWATTS?!?!!???!
What do you mean Doc?
Jigwatts
If there was ever a video of your series where I wished I had visuals THIS WOULD BE IT.
to quote Makise Kurisu from Steins;Gate: "I've only lived 18 years, but I don't want to change any of them. They're all part of my life, even the failures." This applies to me aswell; even though I have many things I regret doing, they are also what made me me.
I believe in steins gate theory.
Same!!
Do you love physics? (And anime?) XD
Very unlikely
I am literally on a bus.
I waiting so long for this video. When I saw that this came yesterday, I checked for the next video but then I realized that it would still be 5 o'clock in USA ;P
Travelling through space-time is like taking out a short term loan. The more you borrow in space, the less you can borrow in time. You travel at the speed of light in space-time, if you use the full balance to travel through space, there's none left to travel through time. If you use the full balance to travel through time, you can't travel through space (good luck finding 'the' spacial reference frame by which that's measured!)
john titor
Ironically your first name is john
Shh, just let it happen. It will whether you like it or not.
this channel is amazing! =D
great video! reminds me of interstellar and the concepts displayed.
Frame dragging means that the motion of an object pulls space with it; so for example, with a rotating blackhole, you would fall in a spiral instead straight down even if you started with zero lateral motion.
I do have a time travel theory. I don't know how to do it, but I have an analogy of time that explains how traveling in time will not cause any paradoxes.
Image time as a stream. We are all floating along. If you could zoom out you would see the whole stream from start to end. You would see all of time. Now traveling back in time is just dipping in the stream somewhere upstream. Whatever change you make there (like killing your grandfather) will propagate with the same speed as anything else. If you would go back to 'your own time', you'd see nothing has changed, since any chance you made in the past will never catch up with something floating downstream.
Entropy is an exchange of states that results in equilibrium. The ice in your glass cools the air in your room, relative to the air in your room warming the ice in your glass.
To travel back in time I would take a music piece from a destination of where you trying to go.Wanna go back in ancient times.Get the formula and start working on dicecting the sounds.💫Have some magical time.
very hard to explain this to a normal person. appreciate the hard work.
Super Superb!! Super Superb!! Super Superb!!
Thanks for sharing!
I think what we are forgetting is how Stephen Hawkings in a brief history time discussing his theory that time is like a cone. Where each moment in time spans out in multiple possibilities. We experience time in a linear way.
Before the episode started I read the subtitle caption things for what they were going to talk about. Then I paused it, "What is time?" I then proceeded to "do a Dan Howell" and have an existential crisis.
My brain hurts after watching this...
Hey Trace!
Could you please make an episode about Skylon and Alcubierre drive? Thnx in advance and congrats for th super cool show 😎
kip thorne! Loved this book about creating Interstellar.
I only understand like 10% of these videos but they're so damn interesting to watch.
Very slick with the advertising...
This is wonderful :)
When we're talking about the Tipler Cylinder being the mass of the sun, it doesn't have to contain helium or hydrogen to achieve that mass. When we cannibalize Mercury to create the first Dyson swarm around Jupiter, we can use the harvested Uranium (there should be a lot of it as Mercury is near the massive sun and probably hasn't had as much time for decay regardless of its increased velocity) to build a ring instead of a cylinder. (Technically it would still be a cylinder because it exists in 3 dimensions, I was just illustrating.)
Time is simply the relationship between 2 or more objects, regarding their speed and distance to one another. Time is a fourth dimension, because the other 3 are also simply a relationship regarding distance in L, W, H. A fifth dimension, that is overlooked, is temperature, which everything in the Universe has as well. Something to consider...
In my opinion Trace, there is only now. All our realities happen simultaneously. Therefore time travel is only possible going forward. If we could build a machine that exceeds speed of light; anyone sitting in that machine would have the impression time slows down compared to the external world where time would move pretty fast. In other words, I think it's only possible to "fast forward."
I think realistic time travel would be supplying the energy required to reverse the flow of causality in a local system. i,e The flow of energy is reversible in a well behaved system within some region of space. Personally I think timelike wormholes will likely behave as time machines only internally. Still this could be useful for computing and manufacturing.
the way I see time travel working is by using a sphere like structure moving at almost the speed of light around you and is shooting charged ions into you to open up a portal in space time to allow the person to get sucked into it or run into it to go to the past or future.
That last one about the donut shaped hole is talked bout in the flash... omg this is so exciting, cuz technically that last one could theoretically be possible.
trace you're a great host and a very smart feller too
Some visual explanation would do this channel great. Either some animations or even some white board illustration
I'll just make a comment on travelling back in time using a synopsis from Boltzmann when commenting on his transport equation after many mathematicians and physicists said his equation wouldn't work because it could break the second law of thermodynamics. "Does the equation say it's possible, yes. Is it likely, no."
Less entropy is more sortable but not orderly. Mosre entropy is far less easy to sort, but more uniform.
Entropy and chaos are about as far apart feom eachother as we are from understanding what happens when we pass through the event horizon of a black hole or what happened at the big bang or if anything existed before that.
Gravitational waves, kind of like a worm hole, connect the beginning of the wave to the end. Time is bent when a gravitational wave passes, so see if there's a way to use that to are advantage to time travel
In my mind, you can travel slow enough with enough speed, combined with enough gravitational force exerted on that space time to in theory move at a negative interval of time. Yes, I know I'm not taking into account that the space time change could be at a slope rather than a straight line, so theoretically in that sense, travel to the "past" (what once was) is impossible, but if not a slope, then yes it is possible. However, moving at 0 kelvin (theoretically the lowest speed possible) would create the opposite effect and in turn push you through time. EX: Twins born at the exact same time, same age, 5 for example, one goes in a "cryogenic" chamber able to freeze to near 0 kelvin, with a clock able to work inside the chamber, to measure time differences. The other twin stays on earth enjoying his/her' life. The clock in the chamber goes to the hour mark, and the twin is released from the chamber, and sees his twin in their 80s (theoretically, this is just an example, no scientific evidence was taken into account of the actual time differences). However the twin from the chamber is still the same age, 5. Now, just do that for a couple years and you end up in the future.
You can travel to relatively future or past points in parallel timelines through a wormhole, or you can travel to future points on your own timeline by approaching the speed of light, but you cannot travel backwards in your own timeline (aside from requiring superluminal speed and infinite energy, the first thing that would happen is you would undo [or do backwards] the thing that made you go back in time). You could combine wormhole/subluminal techniques to travel to a relatively past event in a parallel timeline, make a change, then approach the speed of light in that timeline to see the future outcome, then use the wormhole to return to your own timeline which will remain unaffected. There are no paradoxes because you cannot travel to a previous point on your own timeline.
On a side note - photons travel at the speed of light. When you approach the speed of light, time slows to a stop and the distance between objects decreases. A photon experiences a 5 billion light year journey in one instant, and for that instant, past and present are connected through the wave function until it collapses (is absorbed or affected) at one end. Furthermore, a photons journey is not a straight line - it could have left the source in any direction - so it is a wave propogating out in all directions until is settles on one final position through collapse. To a photon, the entire universe and all of history is one single point in one instant in time.
I think our clock does not necessarily shows "time"... Entropy can represent time. For example if we say : "One second is the amount of time it takes for a 1 cm diameter ball to fall X meters." then the density of the ball will affect the time. So the way we make clocks is important too... just making the clocks move backwards doesn't mean entropy is decreasing... Although if we build AI and better artificial body parts and replace ourselves, I don't think we would want to travel in time for a while...
i don't have my own time travel theory but i do have a favorite time machine which is the back to the further 3 DMC delorean
THERES A GREAT SHOW CALLED SLIDERS, THAT (whoops caps) was about a teenager who discovered the bridge. him and is friends start to slide through to other dimensions and end up breaking the device, so they "slide" to new dimensions at random. its pretty neat
*Frame dragging:* As a massive object rotates, it drags the adjacent region of spacetime along with it. That's frame dragging. Remember his (two dimensional) example about spacetime and gravity? The bowling ball on the bed sheet? Now imagine that bowling ball is a little sticky. Not like glue, but tacky sort of. The bowling ball represents a planet or a star, right? What do planets and stars do? They rotate. As your sticky bowling ball is spinning on the bed sheet, the bed sheet will twist a little, getting dragged by the rotation of the ball. Like twirling spaghetti on a fork. The heavier the bowling ball, the more this dramatic this dragging effect will be.
I had a dream two years ago or more, where earth entered a black hole, everything and myself got sucked in and then I opened my eyes and sprung up off a road where a car was reversing and I turned around and walked backwards(everything was in reverse), I think I seen my own death, and I think I know the street that I never lived near nor knew of until a year ago. This episode reminded me of that dream...I don't know When tho, or If it even will happen like that.
I believe that one place the entrance to these wormholes could exist is around huge stars in far off galaxies because a tear in the continuum can also occur due to too much of warp(as suggested by few theories) and there is more warp where there is more gravity and there is more gravity when there is more mass. And stars have a huge mass making them have more gravity and create a huge warp and tearing through the fabric of spacetime. But the issue in entering these places is the high temperature around these stars and this makes it difficult to enter these holes. Just putting forward my interpretation.
You can time travel, it's just that you're stuck in this time to enjoy this moment.