Is time travel possible? | Brian Greene and Lex Fridman

Lex Fridman Podcast full episode: • Brian Greene: Quantum ...
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GUEST BIO:
Brian Greene is a theoretical physicist.
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[@Thatsaspicymeatball]

This is 6 minutes I'm glad I got to hear. Can't believe there are people writing papers on how reverse time travel could work, whilst I sometimes look for my phone while talking to someone on my phone.

[@appLord1]

Now I know how my dog feels when I speak to it.

[@nicholasmorrison1476]

Does a period of time other than the universal present exist, genuinely wish for any evidence one way or another.

[@perfectifmelancholy]

🤔 so if there is a universal present, -and- one accepts the Big Bang as an objective fact, then would this proposed universal present only exist, from an objective point of view, at the ever expanding edge? All else would be in the past, despite existing experientially (relatively) in time, no?

[@nicholasmorrison1476]

@@perfectifmelancholy My guess in terms of perception is that it can exist everywhere that is, however I don't know if what has past still exists, time may pass at different rates depending on velocity relative to one another, but is there a way to deduce anything exists outside of the present moment, across the universe, you can travel into the future, but not without having the entire present travel along with you, so is there anything outside the present?

[@QuixEnd]

I'm sure there's an all knowing commenter who could answer this Nobel prize winning question.. idk there's a lot of scientists who believe the many worlds hypothesis, but we also just don't understand physics well enough. It's that whole schrodingers cat thing and being unable to tell both the position and speed of a quark, somehow that means infinite universes and not just a flawed measuring process.

[@Padge112]

Don't they theorise that atoms phase out of existence and can phase back in at random. It might be electrons I'm not a genius at all. I just wonder if solving where they go may be the stepping stone to finding an definite answer to your question. They have to go somewhere surely.

[@MrSlugmuffin]

There is no universal present. That’s why it’s called general relativity.

[@garywatson9519]

It's definitely true. In the future, I used to be a time traveler.

[@miyamotoyamazaki1760]

Omg gary.. Gary Watson. I knew It was you. It's me your college roommate from 2086. Dude your onlyfans is gross!

[@garywatson9519]

Is that you Miyamoto? I can't believe it! I thought that the covid86 police had captured you for sure. Regarding the onlyfans, it was the only way that I could pay for my trip back to now, I wouldn't want to miss watching America crumble under Biden, I've just heard so much about it in the future that I had to come for myself. Did see him fall asleep yesterday? It really was quite funny.

[@travisray2934]

@@garywatson9519 Does the planet finally acknowledge the existence of Just Some Bigfoot With Internet Access in your past-future?

[@spankflaps1365]

Travelling back in time is complicated because of the rotation of the earth, you might land in the sky, the sea, the middle of the earth, or in outer space. So you would need to be in a submersible helicopter spaceship. If you do go back, remember to take a copy of Grays Sports Almanac.

[@stephenrobinson3301]

A time machine, if one is ever able to be invented, won't be a stationary construct. It will necessarily have to be a vehicle that can also traverse space. If for example you wanted to go back in time to this date 5000 years ago you would need to take into account the precise location of your present coordinates in space in relation to where those coordinates would have been on earth 5000 years ago. In addition to the sports almanac, a list of various winning lottery numbers wouldn't hurt either. 🙂

[@stevenwalk8564]

It's impossible to calculate at this point. The Earth is spinning, the solar system is spinning, the solar system is rotating around the galaxy, the galaxy is rotating in an expanding universe. Try to drive that back 40 years to meet your grandad. Ain't gonna happen.

[@koozdorah]

Sophists all of you…if we had the technology to travel near the speed of light sure we would be able to calculate those coordinates Remember to take a photo of your family, and make sure you parents hook up

[@JJ-fb1bi]

If anyone does go manage to go back the need a copy of the the biggest underdogs winning in the sport and buy into Amazon when it first starts up make bill gates & jeff money

[@verycalmgamer4090]

@@koozdorah big brain

[@DannyTheBarGod]

Time travel is such an amazing concept

[@rocketoil]

Damn Danny I see u out here tapin in

[@dennisthemenace855]

DO you believe in a parallel universe? I do 🔥🔥

[@billcook7483]

After reading Brian Greene's books my understanding of traveling back in time is like this : Let's say you wanted to travel one hour back in time and let's say that you lived in London ( your starting point ) you could travel back in time but in the process you also have to move in space and you end up at least one light-hour away in space ( in distance ) from where you started from, which means even traveling back towards London at the speed of light for one hour by the time you got back there you'd end up effectively back where and when you started from , ( i.e. you've done a complete loop and ended up back where and when you started from ) . I could be wrong but that's how I understood it . Nature provides a way out of the paradox... Neat !

[@TheHarrip]

The final question will always be our final question. It's human nature. Beautifully said Lex Friedman.

[@youareivan]

a long time ago i read a book of unfinished stories by c.s. lewis and one of them had to do with time travel. the point of the story was that you couldn't travel back in time because all the stuff that makes you up also existed in the past. going back in time would violate the law of conservation of mass.

[@loopmantra8314]

You can't go back in time, if nothing else, because you'd mess up the entropy of the state - adding new mass/energy (you) essentially out of nowhere isn't something that's possible imho

[@jaredgarbo3679]

If it worked like time reversal then entropy wouldn't be an issue.

[@loopmantra8314]

@@jaredgarbo3679 not really sure what you mean. Going back to a certain period in time when the particles you're made of already exist but somewhere else entirely - that's adding mass/energy to a system essentially out of nowhere, and that violates both logic and physics. Time reversal as in Universe reaching a certain expansion point and then starting to contract backwards wouldn't be traveling through time, not in a way it's been discussed here, or I could be missing something, dunno

[@GetawayFilms]

@@loopmantra8314 I think @Jared Garbo means, rewinding the whole Universe in some way... I mean, that should work, but that isn't time travel. Everything, including yourself would revert to an earlier state and you would not even be aware that the future had happened yet. Edit: I literally did not read your last sentence and sincerely apologise for my rude interruption

[@-TheMaskedMan-]

I subbed a few days ago and I already love this channel 🙏

[@NightmareFuelsYou]

The mind can travel anywhere/time. The human body however, was not designed for such a purpose. This is the paradox of our existence.

[@matthewviramontes3131]

That's an intriguing statement, but we're getting into a gray area of what's reality and what's not. For example, the mind can also have sex with whomever it wants, but it's just a fantasy, not reality. Or is it? Is "reality" only something that's done in the physical realm, or are thoughts as well reality, maybe even an alternate reality like an alternate universe? I honestly don't have an answer for any of these questions.

[@loenklos7823]

Thanks for having this guy on

[@GetawayFilms]

This guy? THIS GUY? Do you even know who thi.. ah forget it

[@rayspencer7255]

Perhaps there are an infinite # of universes. Perhaps the measurement problem doesn't imply the collapes of the wave function, it just means this is the universe you landed in when the measuremnet was taken. These alternate universes could be planck time /lengths away from each other. In this scenario, it may be possible to visit a very close parallel universe at a different past time co ordinate, just not your own specific universe.

[@rickclark7076]

Could you imagine trying to predict where the earth presides within our observable universe 1 million years from now? I’m not sure we fully understand the rate of expansion within our universe to make that prediction accurately

[@karateJeff88]

We’re quite good at time travel in a sense of forward. Not so much in reversing but getting closer to slowing down.

[@TimBurtonTim]

What's there to say that traveling through a worm hole guarantees arrival through the other end in the same configuration of matter you entered with?

[@plokijij7856]

I believe our ideas our thoughts eventually became reality, ideas are absorbed by the universe and created!

[@jatinbangar4371]

Past travel really messes up time. We have always known one-way travel of time, and really would destroy reality. Unless many-world theory is true, I don't think it's possible

[@mufflager9065]

Right if we travel back to 2010 will we be there. will I be able to see myself walking down the street. How can I be in 2 places at 1 time ?

[@jatinbangar4371]

@@mufflager9065 Being in 2 places in 1 time is not impossible.. however, it would mess up when you and your past self would interact. For eg : If you go a kill your grandfather in past, it leads to a paradox. That's the schrondinger's cat analogy, the cat being dead and alive at the same time OR, the universe splitting where cat is alive in one and dea in the other, aka the "many-world" theory.

[@housetheunstoppablessed4846]

@@jatinbangar4371 Many scientists believe that the many worlds hypothesis is true. So It very well might be possible.

[@bensontek]

Is it me or is the lighting getting brighter and darker during the video?

[@regblkss]

You can't travel through time using a Delorean like in back to the future. Unless it can travel the millions of miles in space that the earth has moved. The earth will never be in the same space 2x. Its always going around the sun that's rotating around our Galaxy which is rotating around in the universe.

[@GhettoVader]

around the so called sun,, ha ha ha,, you read 2 many books and dont look at the sky MUCH ..lol does the moon go away in the day light ,,NO why explain how the sun and moon are the same size and are out at the same time ??

[@danpark5317]

Lol? Someone has never heard of a flux capacitor. These devices have been established science since 1985. Embarrassing...

[@darrenjones3181]

I saw time travel on TV its true

[@regblkss]

@@darrenjones3181 how nice for you. You probably also believe Hillary emails are just about yoga and weapons of mass destruction were in Iraq and joe biden got a record number of votes 😆

[@darrenjones3181]

Yes I'm glad somone else has the high iq I do very hard 2 find these days I also saw on TV a documentary about time travel were Jcvd time travels as a cop

[@pallyali786]

We can never go backwards. Going forward is possible.

[@ricomajestic]

There is no proof that we cant travel backwards.

[@luckymetal13]

Time travel back to the past is absolutely impossible. How is a mere mortal going to force every atom in the universe, to return to their previous state? Entropy will always win.

[@iwannabethekid34xc]

Small brain take.

[@Makabert.Abylon]

@@iwannabethekid34xc i bet this dude understands it better then you do Solomon

[@iwannabethekid34xc]

@@Makabert.Abylon Why?

[@Individual_Lives_Matter]

Time is a spatial dimension. You don’t have to move anything back to where it was. It’s still there.

[@iwannabethekid34xc]

@@Individual_Lives_Matter Exactly. Wait until we get the hang of quantum machinery. This is gona make things possible we couldnt have possibly conceived of before.

[@jetfigueroa1671]

Whoaahh!!! Me when I see Lex with Brian Greene

[@harbitude]

motion and time can be exchanged with one another in appearance . no two particles pass through time at the same rate because no two particles motion is the same, time is an illusion its simply a yard stick for motion.

[@Paul-ou1rx]

I wonder what a wormhole would do if you attached it to the input and output ends of a black hole.

[@GetawayFilms]

output end?

[@RaulRamirez-qq4td]

Came looking for the Attack on Titan explanation to the last episode Some deep stuff man

[@Marmocet]

Something I've wondered about - is there really a single age of the universe? Wouldn't the age vary from place to place depending on gravitational field strength?

[@thetoad7367]

No.

[@Marmocet]

@@thetoad7367 Because...?

[@kaellum4260]

Once humans have a 'deeper understanding of physics' does not mean that they will be able to predict the new relationships or survive them as a collective.

[@theailateshow368]

My favourite physicist and author

[@GetawayFilms]

Brian Greene is also cool

[@timelkin838]

My question is what happens when we surpass the speed of light? Would we stop time? Perhaps go faster into the future? Or do we reverse time? It's not as easy to prove or grasp. Then when you get past the idea that time is an illusion then the question of choice comes into play. All so fascinating. Life is a koan I think. Yin and yang and infinite. I feel this but all at once I absolutely can't except believing I have no choice.

[@_symmetry_]

The dominant perspective to which I tend to find more logical is if time travel was possible it would already be possible. I find myself more on the side of Lee Cronin on that. Time is the fundamental fabric of our universe, or infinite number of universes. As humans we tend to interpret Time as something we have or don't have, something we attribute a cost to our lives, but I think in its most fundamental state Time exists before everything. I don't see how Time could just simply start or stop to exist at some point. Time could become meaningless at the cold death point of our universe, but I don't see how it can stop. I must not be intelligent enough to understand how, but I don't. All Time, exist all the Time. It might sound deterministic, but I don't see how it could be the other way. Anyway, thank you for these wonderful thoughts provoking moments Lex.

[@chamgod007]

Couldn't we "travel" to the past by beating the speed of light to its next destination and observing what it's illuminating. Essentially, we watch the past but can't perform any actions in it. I am not sure if what I said makes sense as I am not educated on these matters but was just curious.

[@chamgod007]

also if u were to time travel to the future following the guidelines set in the video, wouldn't you essentially be useless? It's not like you experienced any of the time you missed. When returning to Earth you'd provide little insight to their way of life

[@GetawayFilms]

@@chamgod007 Like Fry

[@gg12345ification]

I guess that would acctually work if you were to travling past the speed of light and have some kind of super strong telescope you would beable to observe past events in real time but you would as you said not be able to interact with it as it would be more like watching a movie of what has happend long before.

[@LtFoodstamp]

The 2nd said it allows you to live longer from the observers perspective? No. Your body just "ticks" slower, like a slow moving clock to the observer. That's not more life, it's the same amount. 60 ticks around a clock is 60 ticks around a clock, no matter the rate.

[@flayerthehatebound8920]

Could what they did in Interstellar be possible? They landed on that planet that every something like 1 hour was 7 years on earth? I probably got that wrong but it was something absurd because when they got back to earth. Everyone was dead and old

[@leoverran311]

Accelerate to close to the speed of light, how do you stop?

[@billsikes1589]

Does time even exist to begin with? !!

[@ergonautilus]

Why is the light strobing slowly?

[@bothwellteklacativu7041]

But isnt the main issue with time travel in the future - A Point/ The position where are you going? A decision before its made creates many outcomes and path lines, so if you deciding to go to he future how are you assuming that your decision you made has created the path lines where you are going to land in the future

[@barryconklin3383]

i truly believe we can travel back in time if we can so easy travel to future just haven't figured it out .......yet

[@deepseadarew6012]

If it was possible to travel back in time, wouldn't we have an infinite amount of time travelers from the future? Where are they? Assuming there are infinite universes, you could travel to an alternate reality where it's still 2009 and invest in Bitcoin. Assuming this is possible, then wouldn't we have an infinite amount of victors from alternate realities too? I don't think either is possible.

[@GetawayFilms]

I think Brian hasn't explained it very well when referring to the forwards 'time travel'... He basically meant that by travelling close to light speed, you could make time a million times slower for the observer than it would for the Universe. This would lead to time in the Universe APPEARING to move at an accelerated rate to the observer at near light speed. For Earth, time would carry on as normal, a million years would pass here, the rocket would land and the observer would step out only 1 year older, yet they would have been travelling for a million years. There is no method for taking off in your ship and flying at a speed which makes the rest of the Universe 'tick' backwards in relation to you.

[@MajesticViking]

Futurama was right?!

[@nitroxide17]

Contact was/is a great movie

[@McGE12]

Could be a dumb question: IF time travel is real and we could travel a million years into the future, could there potentially be a civilization/civilizations that already figured this out and know humans are one million years behind and they acknowledge us as just that while we continue to think we are the only civilization in the entire universe (in general terms) hence why we have not been able to find other life outside of earth?

[@revenger211]

I think you overestimate us how long we've existed as a species and overestimate how small the universe is. The notion that aliens even know of us is too far fetched considering that extremely huge distance between us and anything else. We've only barely existed as a species on the grand scheme of time on our planet, let alone existence . We barely make a dent to even have any effect to be noticed by anybody, if they happened to exist. As many experts in this already have said, the chance for life to emerge is so rare, and the chances for consciosuness of ours to exist is even rarer.

[@cpresto2]

I believe it was Hawking who said something to the effect of: we know time travel will never be possible because we are not currently awash in time travelers

[@MentalFabritecht]

Would our body be able to handle time dilation? Similar to asking if our body could handle changes in gravitational effects (or lack of). It seems our body isn't meant to experience gravitational forces that are very different than the ones here on earth. If we experience a lack of Gravity for prolonged periods of time, our muscles atrophy and our bones decalcify. I imagine our body could also experience adverse side effects when exposed to time dilation.

[@user-kg2sk4tf6t]

But we could train in space, to prevent our muscles from suffering. Maybe create gravity on a spaceship, take vitamins pills and work out

[@MentalFabritecht]

@@user-kg2sk4tf6t we could try to find ways sure. It wouldn't be easy to recreate the gravity of the earth on a spaceship. Exercise, Vitamins and pharmaceuticals are not enough. The cells need the CONSTANT force of gravity in order to perform metabolic processes as well as have enough stimulation to continue being. Would we also try to find a way to speed up time as well to counteract the time dilation (slowing down of time) in order to be able to withstand those trips physically? Seems like we don't yet understand the issues that space-time travel, specifically travel at relativistic speeds, would produce for biological beings. We usually think radiation or space debris is the biggest of our concerns.

[@blake8580]

My mind grasp this momentarily. Like …… OH YEAH!!! then I forget again 🤷‍♂️

[@ldwankenobi5618]

Yes.

[@altortugas5979]

In the deeper understanding of physics, causality is bidirectional and time is an illusion.

[@ai-ur5uv]

İts all the same moment. No past or the future

[@Doushibag]

Traveling super fast isn't 'time travel', it's just creating a relative difference of 'aging' due to motion differences, time dilution of a sort. Sticking a mango in my fridge and leaving one on the counter so they ripen at different rates isn't time travel. Casuality works on everything always and nothing has the capacity to make itself go in the opposite causal direction or change the rate of causality upon itself (time travel). Thus actual time travel isn't possible either way. I think the word 'time' creates a lot of issues because it has different meanings. Perception of time is relative between objects, absolute time is persistent and consistent. Edit: For example, in Interstellar, sending gravity waves or anything else back in time definitely isn't possible, but a time dilution effect between people on a dense planet and in orbit of it, is possible. I think it creates confusion when you refer to both of those as time travel.

[@kirbykirby4173]

What's that thing hovering over west of here?

[@Fendigamingsupporter]

You can only go back in time to past in your own mind and make up the new narrative ei. Growth or plain old imagination wishing for things that were better. Learn unlearn and relearn, we’ll wishing all forms of potential time travel. Time travel of the mind. It’s a beautiful thing

[@stevenlee5205]

Maybe not physically back, but a window to look through. There by not breaking any rules except obtaining information

[@ChechoColombia1]

By photons.

[@ChechoColombia1]

Or tachyons.

[@stevenlee5205]

@@ChechoColombia1 I would have thought neutrinos, but they are slippery buggers to find let alone work with, but they are the perfect candidate, nothing effects them.

[@stevenlee5205]

@@ChechoColombia1 ideal for dropping into a black hole.

[@GetawayFilms]

We already have a window to look through.. The Sun's light is 8 minutes old... Some of the Stars we see in the night sky haven't looked like that for millions of years... If another planet 2021 light years away is looking at our planet right now.. They are looking at Earth as it was in the year 0001 (yes okay okay A.D 1)

[@Hister303]

Lets GO!! Lex making science cool again.

[@tumarfa]

0:44-1:20 - So if photons were sentient, they would experience trillions of years having passed when arriving at the next star? :) Or are sentience-less particles somehow exempt? I mean, if photons from our Sun, after reaching Alpha Centauri, could turn around and go back, would they "discover" that ~9 years had passed, or trillions?

[@Individual_Lives_Matter]

Imagine if we could “code” our consciousness into a beam of light.

[@frankgrimes465]

A sentient photon would arrive anywhere instantly with no time passing, from its perspective.

[@EobardFerguson]

@@frankgrimes465 Then how is its movement possible? That question has boggled my mind for a while. It wouldn't 'arrive' or 'depart'. All points relative to it would exist simultaneously, and all of existence would be one infinite point in spacetime.. how could the photon 'move' at all, let alone appear to move to an observer?

[@NuclearCraftMod]

@@EobardFerguson From anything’s own reference frame, it doesn’t move. Objects only move relative to other objects. In the case of a photon, the universe is infinitely Lorentz-contracted in the direction of its propagation, and so the distance to its destination within its own reference frame is zero.

[@EobardFerguson]

@@NuclearCraftMod I get that, but how can it propagate if its time relative to anything is zero?? The term 'propagate' by definition implies a beginning and subsequent moments.

[@Sungoku47]

3:28 the show Dark on Netflix lol

[@ralphholiman7401]

Well, I'm sure of one thing. If time travel is ever discovered, it's not going to be by anyone who has already decided it is impossible.

[@calvingrondahl1011]

Why time travel? Fun to talk about the science of space-time.

[@maraudostrogoth747]

I'm travelling through time right this instant... And this one... This one too! ...Now this one... maybe?.. Yeah, I guess that one too...

[@GetawayFilms]

Wasting it too by the looks of things.. I like you

[@susanwoodward7485]

The only time travel will be"karmic" = dependent upon individual actions/thoughts, etc. Causality must be considered clarified in this discussion!

[@seansears2457]

I still don't understand how more time and the process of aging speeds up the further away you get from our place in the universe, can someone explain?

[@seigemusic423]

I like how EVERY commenter probably has to go to work or school but right now they are more intelligent then the guest and lex lmfao 😂

[@nufh]

IKR

[@gagemarshall2554]

Do you have your PhD or have ever taught at MIT, Cornell, or Columbia? Do you think EVERY commenter has?

[@fredinthemix]

Yeah awesome

[@justinkyle4052]

And that makes him less of a grifter, how?

[@GetawayFilms]

The guest? THE GUEST? Do you know who that man is?

[@UrbanSasquatch]

I personally believe time doesn’t exist outside of the present moment, on a cosmic scale we exist inside a giant wormhole and at the dead centre of it their is a whirling mass… known as the world. Thats why humanity is so important and it’s such a blessing to be gifted with life, the present moment. Notice if you live in the present moment life can be profound, If you live outside the present moment then you lose touch with reality.

[@darrenjones3181]

It's the sound that we don't hear

[@lj7169]

I don't understand why we even talk about hypotheticals like bending black holes to create worm holes so that we can time travel through them, it's completely ridiculous

[@stephenrobinson3301]

Cause it's fun? 🤷‍♂️

[@surfingtothestars]

Imagine those in the Middle Ages thinking it was ridiculous about man flying

[@rcnyoplait]

I know right...we should talk about world hunger and health and corporations killing the world! Oh...we do that already? Talk about pointless conversations

[@lj7169]

@@rcnyoplait those are things that can be fixed. No one is ever going to be able to bend a black hole and go through it, lmfao

[@rcnyoplait]

@@lj7169 Youve obviously never seen Interstellar 😛

[@DELL0015]

Timeline need to be fixed. Time to figure out how to make myself into the flash.

[@nicholasmorrison1476]

OK naively, open to any thoughts, So the intriguing property of light is as far as I am led to believe about relativity, it connects the start and end of its journey and what it interacts with together, as though the two objects that are in separate times were existing in the same moment from the lights perspective, because from the lights perspective there is no time, only space, the entire of existence exists as a single instant from the perception of light. ... Any thoughts?

[@xaptronic]

What is the perspective of light?

[@nicholasmorrison1476]

@@xaptronic strictly speaking it has none, however my understanding of any physical being that travelled at such a speed let's say orbiting the earth for 1 million years would have no time pass, and arrive 1 million years in the future. So I just pretend as such, not a scientist, but love even the bare attempts to gain insight into reality.

[@xaptronic]

@@nicholasmorrison1476 It's an interesting thought for sure - I think - and I'm no scientist either - that some of these rules are different because photons don't have mass - but I have no idea what I'm talking about, and I think the thought you put forth is interesting to think about.

[@Individual_Lives_Matter]

I was thinking about that too. When they beamed the inhabitants of Westworld into the sky as light I thought would a consciousness made of light appear to be nearly immortal to a much slower observer? Would that being last forever, absent interference with their flight path? Is that a way to travel in time, to turn ourselves (temporarily) into light?

[@FalkoJoseph]

Forget about a physical time machine. In a 100 years from now there will probably be a KZbin-like app where you can watch hyperrealistic virtual environments and relive moments of the past in 3D. Entirely simulated by AI and powered data from the past. Think of it as a next-gen Google.

[@winstonsmith7652]

So, we'll just move this worm hole closer to this black hole for a bit, then move it back again. Sounds simple enough.

[@darrenjones3181]

Yep 2 forklift drivers needed free acomidation must be good at moving worm holes

[@jaymwalsh102286]

So if going to the future requires high levels of speed could we go back if we some how had the complete absence of movement inertia momentum velocity etc. In Futurama the professor space ship traveled through space by letting space travel around it. Any thoughts

[@crontemisto8994]

Is this where Zack Galifinakis got his idea for Between Two Ferns?

[@mintkondish7396]

Lex keeps his eyes closed so often, I don't know why he expends the energy to open them at all

[@jacquesjtheripper5922]

Lol, it seems so hard to formulate each question idk, maybe not his primary language.

[@AllknowingUnknown]

Maybe his eyes catch light to recharge his batteries🤔

[@GetawayFilms]

Lex is aware that if he keeps a low entropy state, he'll live longer... Big brain tactics

[@Lesminster]

So, if you put all the humanity near any black hole but you stayed far from it, you would esentially travel back in time of humanity ;) Imo traveling in time idea is mostly imagined in context of you being able to meet yourself from the past/future or becoming yourself from the past/future(like in being young again). Travelling forward in time by moving super fast or being close to huge gravity source is not at all traveling forward in time in terms of taking shortcut through spacetime.

[@harryh628]

time travel is maybe the wrong idea i think time control or something would be a better description.

[@saltyschmitty7]

noting is truly provable in physics, things can only be disproven

[@richrent]

When you film an event successfully no matter the medium, that is a rudimentary form of time travel.

[@nestoralves3050]

I don’t think you understood the conversation that took place my good sir.

[@richrent]

@@nestoralves3050 maybe not

[@paulryan2128]

Photography isn't time travel.

[@richrent]

@@paulryan2128 agree to disagree

[@angmaugeri]

ive done it...nothing like i imagined it would be

[@katewood5892]

It is correct says" time trave is possible from meditation".

[@reality8605]

Does light time travel? If you had a mirror half a light years away and you shine a light at it, will that light return in 1 year or 1 million years time ?

[@ricomajestic]

1 year.

[@13REW]

We are all traveling through time 🧙🍄💯

[@user-ix3uy5zd2i]

is time travel possible to past future i wan to do I am from india please help me out

[@user-ix3uy5zd2i]

is time travel to past future really possible and how

[@GetawayFilms]

I would like more on this topic. Wouldn't time travel machines exist right NOW if they are ever to built AT ALL? I mean, once it's built, it exists across the whole of time surely?

[@gg12345ification]

Well yes but that is assuming the future has already happend yet witch we dont know. The first thing they talked about witch probably is possible to traveling forward in time. And that isnt rly that you are jumping forward in an already existing timeline but you are just traveling so fast that your time will pass slower for you meaning earth life will continue as usall but when you return 6 months (for you) later earth will have progressed 1 million years. So its less time travling and more a super advanced way of preservering your self for when the furture arrives. But i dunno maybe your right when it comes to traveling back in time.

[@nsfeliz7825]

which implies pre determinism. god or nature sets it up?

[@davidnk673]

If we could travel back in time we would already know it by now. Because the ones in the future, no matter of far that future is, would have traveled to this time and let us know.

[@piotrbrodowski5084]

That’s assuming someone has already traveled in time

[@MatthewOfLondon]

Hi David, are you aware of Michael Masters? He's a deadly serious scientist with a very strange but strangely plausible take on time travellers. 😉

[@davidnk673]

@@piotrbrodowski5084 if anybody in the future could have time travelled to the past. Wouldn’t that past be consider today’s time or even the time before us. Since no one has ever seen anybody from the future, I am pretty sure no one has ever time traveled and that till the end of time.

[@piotrbrodowski5084]

@@davidnk673 if nobody ever came up with time travel yet, then we wouldn’t see anyone time traveling. Just because it wasn’t invented yet doesn’t mean it will never be invented

[@piotrbrodowski5084]

@@davidnk673 I know what you mean and it’s a pretty good point to make, but there’s a catch to it. There’s some chance that time travel was just never invented, YET.

[@kirbykirby4173]

QUESTION!!!

[@stevenlee5205]

You could also argue that we are information of a biological nature, so if nuralink could express our consciousness in one's and zeros we should be able to experience past events without actually being there physically.....Maybe?

[@caribgirl726]

Maybe….. but now, when you say “without actually being there physically” it also brings up the question: is this physical reality “real”?

[@johnreagan7596]

Worm holes don't make any sense. That and black hole aren't holes at all.

[@lashajakeli]

Can anyone explain why is it a requirement to leave the earth. What if you move a particle with speed of light on earth in your lab? Will that particle experience any time travel? Total physics nab here.

[@worker-wf2em]

As to your first question, significant time dilation occurs not only by moving at relativistic speeds but by removing any warping of spacetime by any large gravitational body, such as the Earth. That’s why clocks on Earth need to be constantly calibrated with those on satellites in orbit. Your second question as to whether photons experience time travel, photons don’t experience time as they are moving at the speed of light. From our perspective you could argue semantics but a photon’s perspective, what even is time?

[@BBoldGaming]

You can travel in time through meditation. I have done it while in a coma

[@sexbuffet]

were you actually in a coma?

[@BBoldGaming]

@@sexbuffet yessir even have a podcast episode on what happened briefly

[@operationNOBO]

Just touch Granite

[@green8026]

Yes

[@stevenlee5205]

Maybe entangled packets of consciousness at two points, one near extreme gravity point an the other at a Lagrange point. Something like that, just a quick guess.

[@Individual_Lives_Matter]

Would a quantum computer ever be able to use quantum entanglement to communicate with parts of the universe outside of itself? I’ve been wondering if a quantum computer ever becomes artificially intelligent, if it could expand itself. My brother was talking about the problem of interference when they build a quantum computer, how they have to isolate the computer from outside “noise” and I wondered if an artificially intelligent quantum computer would see the interference as noise or usable information.

[@stevenlee5205]

@@Individual_Lives_Matter not sure, you could ask the computer is if can discern any meaningful information in the noise or a pattern to impute intelligence

[@stevenlee5205]

We already do it when we use a telescope, so light carries images from the past.

[@caribgirl726]

Interesting….?!

[@Makabert.Abylon]

Seing the past and travling to the past is not the same

[@aquibkhan3026]

If i made a sound (or shot a gun) .... The people around me will hear it first .... But the people who are at longer distances they will hear it later. That just mean u get to observe the incident later just because of travel distance/speed of sound/in telescope case light. (I'm not good at English ... Not my language)

[@AP-dk9xt]

Doesn’t history get erased inside of these black holes. No information escapes them; there’s no past to travel to as a destination. We have personal concepts of “history.” Memories fade when we die. The black holes shred all of that old data. Then, we get reinstalled into another operating system on a new, clean hard drive, physical body. Where does all of the information go? When we sleep, we erase it. But it must be dumped somewhere. Does the black hole in the center of the galaxy take it? Does it clean our mental slate? Rinse and repeat? Try imagining your recent or distant pasts. You can’t hardly do it. We remember almost zero detail. Where does all of that information go? The black hole perhaps.

[@baltimore52394]

What exactly is the past

[@dylanfuller8146]

I knew this in high school by reading the Enders game series 😂

[@robertsanchez3984]

If our body's can't travel the speed of light even in a machine that can because of the Gforce. Assuming consciousness is a form of energy? Would it be possible for our Consciousness to travel the speed of like? If we figure out how to transfer consciousness. Would something like this theoretically work? Traveling through light itself by becoming light.

[@ai-ur5uv]

Actually you just move my consciousness from my reality to imaging your question

[@Sockpoppet]

I suspect time is like a stream of water running down the mountain, we are caught in it's force.

[@ahm911]

einstein would start a jetski company

[@Individual_Lives_Matter]

I would say time is an impossibly slippery slide, like gravity but much more slippery, and we are sliding down it. It exists as a whole but we only get to sense the part we slide through.

[@chadams6242]

Didn’t Einstein point out that if it were possible to travel back in time then we would have already been visited by people from the future?

[@dontcare7086]

I'd assume they'd have rules. You wouldn't want to jeopardize the future. You gotta think of the butterfly effect. You could stop and talk to someone and that conversation they were never supposed to have could make them miss the moment they met the person who encouraged them to follow their dream. Maybe the dream is science and now they don't cure something. Future is totally different now and a whole new chain reaction of events changes because a lifetime of interactions with people you would've have didn't happen now. I know that sounds extreme but it holds true. If you mess up 1 thing you're not only changing that but your changing everything else that should happen because of that 1 thing.

[@Scootin_yinzer]

It was Hawking that held a party for time travelers. The invite was announced after the party.

[@UserName-ii1ce]

The Brobot back with another banger 👑

[@JohnDoe-101]

It's possible but not for humans.

[@liberty-matrix]

Just got back from shooting a T-Rex, so yeah!

[@hitmanhatton]

If there is a place outside of our universe where space/time haven't filled the void. Then it would it possible to observe the past present and future all at once Assuming time has no meaning there. and the void is eternal.