Paul Davies: Can time travel be done: sci fi or sci fact: Arizona State University (ASU)

[@Ken-fh4jc]

Love Paul’s sense of humor.

[@TheRealNCYank]

It would be nice if the video showed all the photos that appeared on the screen, instead of just some of them.

[@PeterSloot1]

A real pity that the movie editor decided not to show all the great slides that Paul showed...

[@briane.j.3417]

We are already time traveling forward in time. We may be able to travel forward in a way that seems faster such as sleep or freezing. Time isn't a train track or a video tape. Time is a construct to explain mostly irreversible progress. Once something occurs the instance of it having occurred cannot be changed. Further progress can alter or undo it but never genuinely reverse it.

[@hyper_dragon6302]

Great! I love Paul Davies ❤😘❤

[@velihall]

If you are recording at this level of information, you must know to always show the slides. I can only handle a bit of this without seeing what he's talking about. Huge missed opportunity. I hope you can re-record sometime and just set back so we can see the screen. Then leave it alone.

[@robertosvrahimis3304]

Just fire the cameraman. He stays on the lecturer and does not show the slides. What an amature!

[@ZachBlackburnFilms]

Video begins at 1:30

[@BigSnipp]

But the Smoke Show started at 00:10.

[@KipIngram]

My honest opinion on this one is that we're missing something (to the extent we ever thing back travel in time could be possible). There's more to time than it just being one axis of a 4D spacetime. CHOICES separate the past from the future. Causality. The paradoxes that reverse time travel would allow just can't be entertained - can't happen. When the dust all settles, we're going to find that there's always something that keeps it from working.

[@Prenders145]

Genuinely enthralled.

[@KipIngram]

32:50 - Why doesn't the neutron star exert its gravitational field through the wormhole to the other side, and thus warp time at both ends?

[@wardandrew23412]

The phenomenon known as time dilation is not a case of time travel. The paradigm example of time travel is one in which a person (by various means) leave the present and reappears in the past or future. Someone traveling at a high rate of speed relative to the earth is doing nothing of the kind. He may not experience the effects of time like his counterparts on earth, but that doesn't mean he's "traveled forward in time". No more so than someone who has been placed in suspended animation and revived a century later has "traveled to the future." An astronaut traveling at close to light speed never actually leaves the present. If it were possible to observe him through a telescope, he would remain visible to viewers on earth throughout the entire length of his journey.

[@bryanpinto4051]

the earth is flying thru an expanding universe right? So, in order to time travel you would have to go back in time to where the earth was in the previous expanding universe right? So its impossible. Right?

[@Rob-bh9gt]

really cool stuff. i wish the camera guys weren't always pointing at the same spot. i can't see jodi foster.

[@proenrichment]

To say to place a neutron star at A and freeze time. How the process will be? And how to travel back in the conventional way from B to A. Can Paul Davies explain?

[@respectgod3302]

I travel through time all the time. I am 24 hours in the future farther than I was yesterday at this time.

[@jakethompson7925]

But it is today not tommorow

[@r.tfishall5391]

Just a shame that most of the diagrams etc where not shown

[@Stinger-rq4gy]

32 minutes is the best bit guys!

[@KipIngram]

37:10 - SHOW US THE IMAGES HE'S SHARING!!!! What good is this if we can't see what he's talking about???

[@martini4948]

Happy Easter.... If you have a spare minute, look! Many Thanks.

[@KipIngram]

51:00 - Actually we can't access the Planck distance, and never will be able to. I just saw a young physicist (I forget his name, but I think he's got some good stuff to say) talking about this the other day. KZbin search for "doom of spacetime." His whole POINT was that spacetime as we know it will have to go as a fundamental support pillar for our future theories, and here's why. Say you have a microscope, and you want to look at something of size dx. Well, you have to use a wavelength at least no larger than dx, and probably somewhat smaller (say a factor of two). Smaller wavelength means higher frequency, and higher frequency means higher energy. So as you try to take dx downward, you're pushing more and more energy into less and less space. Eventually you get to the point where you make a micro black hole, and then you don't see ANYTHING from in there. So there's no operational meaning to even talking about spacetime volumes smaller that order dx^3. And guess where that happens? You got it in one - the Planck length. Regions of spacetime smaller than that have no meaning.

[@Stinger-rq4gy]

Someone needs to tell him: If you have a time machine, you need to be able to lock up the time period you left from causality effects, effecting it. Imagine if the time machine you had could move things from the past, from the future. Move a quark out of place in an atom in a grain of sand, on a beach 1000 years ago. Something as little as this, is enough to change the whole history of the earth from that point on.

[@grouchyarchie]

You know, I've thought about that, too. And I think Neil Degrasse Tyson talks about it on the video series 'Adventures of an Urban Astrophysicist' that someone posted here on youtube. I don't pretend to know the answer, but I'm guessing that the dominance of empty space in the galaxy prevents the black hole in the center from sucking everything in so quickly. I'm glad you posted that question - it is food for thought...

[@checkmate440]

Well i'm glad I could help you and what is your theory on ghosts.

[@scarakus]

In a Gravitational Field... If you could wrap a air craft in a gravitational field, you could make a nice comfortable turn, but relative to a viewer on the ground, you'd be zipping around making impossible 90 degree turns. Pretty sure we already have this...

[@Beamshipcaptain]

The Biefeld Brown Effect. Already done, and patented!

[@johneyon5257]

1:49 Start of Paul Davies lecture

[@RedVynil]

At least it's not a long intro, like in the last video I saw where the woman went on for nearly 7:00 about how much fun she & her daughter had going to Melbourne!!

[@arlaban22]

This was an excellent talk.😊

[@arthurvin2937]

I believe that traveling to the past is absolutely impossible, no way. To the future - why not, but that's a one way ticket which means you travel to the future and you stay there, you can't go back ever, but you can go even more to the future though. If you had started a children in the past and then traveled to future you might meet your 10x grandchildren and say them that you are their 10x grandfather. Also, if traveling to the past would be possible, then we would already experience and meet those travelers from our future at present time. However I didn't see anybody claiming that he's from future. Makes sense, right?

[@733eel]

Arthur Vin I tend to see it that way too, although maybe travelling back in time is possible, yet humans became extinct before it was invented hence we don't see any time travellers. Then that brings in the question of predetermination.

[@markusjohnson6558]

Arthur Vin The argument against time travel of 'We haven't seen anyone from the future yet' is often brought forward in debates regarding time travel. Carl Sagan the renowned Astronomer and Physicist called this argument 'Very Dubious' - Perhaps it would only be possible to travel back as far as when the Time Travel Wormhole was engineered and not go any further back, would be one counter argument. The main issues that Physicists whom have done research in this area have with the concept of Travelling Backwards in Time are firstly that Wormholes are hypothetical, they don't even know yet if they exist. Furthermore if Wormholes do exist stabilizing Traversable Wormholes would require an incomprehensibly large power source that only a civilization far more advanced than ours could develop. Another major issue according to Scientists like Stephen Hawking are the problems of Paradoxes, which would mean that nature simply wouldn't allow it although there have been solutions to the Paradox issue such as the Novikov Self Consistency Principle.

[@glutinousmaximus]

'Travelling back in time' - think of it this way: Imagine your friend invents a time machine. He invites you over that evening for a sample trip to the past. The Problem with this is that _any such trip will always be in your FUTURE._ Nasty. ¯\(ツ)/¯

[@1966human]

I don't know about physical time travel, but i believe in other time remote viewing, some times i think it is already being done

[@deandeann1541]

In a universe large enough to contain every possible combination of matter and fields your remote viewing must have some truth to it, as anything you think about that does not violate physical laws will indeed exist.

[@yaoming42]

I HAVE NEVER THOUGHT OF THAT.....

[@datboydsmoke]

We can't time travel forward or backward, we can only travel faster. Ex: if I am driving to work I can leave at 7 and make it their by 7:30 but if I have to walk I would have to leave by 6 to make it their by 7:30. Time is not changing only speed.

[@KipIngram]

48:00 - The Many Worlds theory is bunk also. Just consider this scenario. Many Worlds says that all possibilities move forward from every spacetime event (every location, every instant of time). So, imagine Mr. X, a man made blissfully happy by his marriage and family life. Just imagine the best of all possible situations - everything is perfect. But - Many Worlds says that a branch comes into existence in which a version of Mr. X, who shares 100% of his blissfully happy past with all the other Mr. X's that emerged from that particular spacetime event, will proceed to go home and murder his family. Some sequence of quantum event outcomes would lead to that, so Many Worlds says it happens. If you can really stomach that - if you can really believe it just makes total sense - then I just don't know how to argue with you. Many Worlds predicts an infinity of such "completely ridiculous event sequences." Too many for me to buy into. I'm *sorry* that means physicists still have some explaining to do (the nature of wave function collapse). But just tossing out that phenomenon comes at too high a metaphysical price.

i cant see the slides... -.-

[@flatisland]

7:07 yeah, why not. He does bear a certain resemblance to Patrick Troughton. Who would like to see Paul Davies as the next Doctor: thumbs up

[@tpf5915]

Yes good idea he does look similar !! 👍🏻🤣

[@KipIngram]

44:00 - There you go. That's all the argument you need to see that this must be prohibited by natural processes. If we think our laws of physics allow it, then we're wrong, and someday we will know better. It seems just that simple to me.

[@TheBreck1]

Gravity is not charged mass? With out electromagnetics how could mass exsist? Emf synthetic gravitations would produce negitive exsotic material worm hole thus mdh thrust according to dielectric kurr feild. All made possible due to over unity. As in the trb3 including thomas brown electrogravitics = floresent lighting.

[@KosalYan-pq2xy]

WITH-RESPECT; “ GOING-BACK-IN & GOING-FORWARD-IN-TIME-ARE-VERY-POSSIBLE!. “ Proof: * THE HUMAN-BODY-IS-THE-PHYSICALITY-TIME-MACHINE. * YOU CAN ASTRAL-PROJECTS YOURSELF BACKWARDS-IN TIME. AND, YOU CAN FORWARDED YOURSELF INTO THE FUTURE.

[@juangreen8194]

but I wanted to see the phone boxes :(

[@issammohanna2206]

The escape velocity from Earth is about 11 km/s.

[@dickhamilton3517]

he got his metres and kilometres mixed up

[@bobleclair5665]

What if you go back in time to save someone from jumping off a bridge and they take you with them,,,would that be a recurring dream I’m having????

[@RagHelen]

The law of conservation does not forbid time travel, of course (minute 42).

[@RedVynil]

That's okay, I really didn't want to see any of the pictures in his presentation, anyway.

[@cbr125rcanada]

If time travel were possible, someone from the future (when it would have to be invented, since it hasn't been invented in the past or present) would have already come back to visit us and let us know about this greatest of all possible inventions.

[@Beamshipcaptain]

Read about John Titor.

[@checkmate440]

I'm considering bringing a camera to a cemetery and taking pics.If I do I will let you know the outcome.

[@davidinfante6348]

Well is one mistake in his lecture it's not only the faster you go but it also depends on the direction you go yes if you travel away from a moving object at the speed of light your time will slow down and their time will speed up but if you turn around and go back the other way towards the object then their time will slow down and your time will speed up see you end up being there at the same time and the same age the only time one person becomes older than the other is when you go out away from the other person and don't come back

[@mrmoooable]

You'd have to travel close to the speed of light to get to any significant future time. And, as mass cannot travel at that speed it's theoretically impossible?

[@mariastrikwerda3074]

+Oners82 Is it not so that with the accaleration the mass increases and any further accaleration would then take more energy...until an infinite amount of energy would be needed...wich then is impossible? I think that is the correct answer: so yes it is impossible for any mass to reach the speed of light!

[@mariastrikwerda3074]

Oners82 Oh, really? So what did you want to say with "No, its absolutely possible..." ??? What is absolutely possible then? Complete quote: "No, its absolutely possible, all you need is a fuel system that can maintain a constant acceleration"

[@mariastrikwerda3074]

Oners82 Well, that depends on what you see as 'close' to the speed of light. You cannot reach a speed that close that it will have such a significant time effect. It takes just way to much energy. You can find calculators on the internet with wich you can calculate what kind of speed makes a noticable time effect. You'd realle have to speed up very close to the speed of light, and that is just impossible because the amount of energy needed for that would be more than there is in the whole solar system.

[@mariastrikwerda3074]

Oners82 Guess YOU have to read again. Quote: "You'd have to travel close to the speed of light to get to any significant future time...". In other words: the question is about human time travelling and not neutrinos. A spaceship cannot reach a speed close to the speed of light. That is not just my opinion. Also 'relativistic effects' are not the same as "...to get to any significant future time" and that is what the question was focused on. The speeds that you could get with an accelerating spaceship won't get you any significant future time.

[@mariastrikwerda3074]

Question: "Please tell me what physical mechanism prevents a spaceship from achieving a speed close to c." Answer: because as the speed increases, so does the mass...and as the mass increases you need more energy to keep the same amount of accelleration. But with this continued acceleration the mass increases futher and even more energy is needed for the continued acceleration, etc, et, etc. Remark: "Erm, relativistic effects are the mechanism that allows future time travel..." Response: Yes, but any acceleration will bring relativistic effects with it, also wenn I accelerate in a car. But you would also not call this 'time travelling'.

[@RobRoss]

I don't know if time travel is possible. But I do know it's possible to build a time *machine*. I built one out of LEGO once.

[@katiekat4457]

You would think that she would mention that he had a nobel prize or call him Professor Paul Davies instead of just Paul Davies. But she’s adorable like my daughters so it’s okay.

[@sazonsongs]

She’s got pretty girl privilege. She gets a pass.

[@scarakus]

I think I'll go play Elite: Dangerous, make my own wormholes...

[@1966human]

I am her think tank

[@jakethompson7925]

I.can now verify travel exists because I just saw Amanda do Sgt Peppers on Tic Toc. Time Travel is easy. Not traveling time seems to be a better challenge. Try looking for the. n. longitude on Earth that is equal to the speed of light in milliseconds.... .whoa that's a head scratcher.

[@Methadras]

Backwards time travel is impossible under every possible circumstance short of a mathematical rendition of what it could be like. The reason it's impossible is because you would be asking the entire universe at every point and at every scale and all the way down to quantum foam and plank time to the largest scales of space time to stop and then reverse itself to the point you want to get to. You would in effect be asking the universe to become it's own memory storage device to record, hold, and maintain every event at every point for every particle at the quantum level and at a plank time basis from it's inception to the time the time travel commences to where in the past you wanted to end up at. While it's fun to think about simply opening a portal or wormhole or use a time machine to tunnel your way to some point in time, you just can't do it. The universe isn't a memory device and space time has no way to reconstruct everything back to where it was you wanted to go to. Not to mention that you couldn't generate enough power to even conceive of the idea anyway. You would need the consolidated energy pre-big bang to even consider creating such an event. So I'm not sure why physics or even physicists still ponder this idea any more.

[@Methadras]

@Oners82 I'm not talking about the loss of information. I was talking about knowing where that information should be when a time machine has to stop everything and rewind the universe back to the point the user wants to go to. This machine has to store all of that information of the entirety of the universe, which makes it a universe unto itself, and then it has to stop the motion of the current universe and then reverse it to the time the user wants to go back to. If you want to punch a hole in the universe via a machine or a singularity, you need a device to navigate reversing everything back to the point you want to go back to. There simply no way to do this. None and there can never can be.

[@Methadras]

@Oners82 I realize the information is stored in the universe itself, but it no longer exists once the past has gone, so there is either a way for the universe to recall that information or the machine that you will use to travel back in time has to recall that information. That information has to come from somewhere and if it no longer exists, because even under QM, that information is gone due to the fact that it has been rewritten by the present, so the past is no longer reformable to be traveled to. For example, you can bring the ingredients of a cake together to make the cake, but you can't unmake the cake back into its constituent ingredients. Lol, you don't have to argue with me because I wasn't arguing. I know quite a bit about GR/SR. I'm simply postulating an idea that backward time travel outside of GR/SR mathematics vs. the reality is an impossibility. Also, time is simultaneous and continuous everywhere throughout the universe since it is time is a continuous dimension and our experiences of it are different the faster we travel through the medium of that dimension via space. Hence space-time which is space immersed and intertwined with time. Outside of large gravitational bodies like Black Holes, where time dilation occurs, you have a continuous and simultaneous flow of time, ever forward. Never backward. There isn't a single body of proof anywhere to show time moving backwards. Also, as to wormholes, while they theoretically can exist near a large gravitational body or anywhere else for that matter to traverse through space-time from a point in the present to an anchoring point into the past. That is why they are mathematically possible and realistically impossible. One, you being near a large gravitational body would inherently make them unstable and constantly trying to counter the large gravitational fields being imposed onto them. Secondly, they themselves would have to exhibit vast amounts of power in order to maintain their gravitational fields in order to remain stable. On top of that, their gravitational fields would be massive as well. Thirdly, they would have to maintain an anchor in the present while being open on the other side to somewhere in the past since time within a wormhole would be completely different than temporal continuity outside of the wormhole. That alone makes them a realistic fantasy and in reality a mathematical one as well. So if anything entered the wormhole from the 'past' side of the wormhole, would it exit into the 'future' aka our present? The answer to that would be no. Why? Because that would leapfrog GR/FR to travel into the future without having to traverse the speed of light. That alone breaks all known physics short of something utterly exotic which hasn't presented itself up to this point.

[@hauntedhose]

2020 nothing

[@morrishardinday]

Bill and Ted's Excellent Adventure

[@checkmate440]

I'm thinking a ghost is the devil or a demon playing tricks on us humans. Never had any experience with one but I would love to see one.

[@yaoming42]

You should might as well take a video of it while your at it and post it on here one KZbin :)

[@aqwertgbvcxz]

I thank you for the tip. I will make sure I watch them. Neil Degrasse Tyson is always a pleaure to listen to.

[@amittiwary7432]

The Big Bang theory and Inflation of Universe rules out Time Travel

[@warnmyfamily69]

Of course God can time travel. The Bible is full of examples of prophets taken back in time, one specifically being Moses who was taken back to the creation of the earth so he could write genesis. Can man do it? of course not.

[@faith4today]

Somebody needs to go back in time and give the video camera guy a good smack and tell him to show us what the professor is talking about on the screen.

[@fightclub214]

Akon Smack That all on the floor, its 3 am in the mornin' put my key in the door an' body's layin' all over the floor, but I don't remember how they got there but I guess I must have keel'd 'em kieell'd 'em - Eminem 3 AM

[@faith4today]

That might be a little too drastic, lol.

[@ELLIOTNEWPIP]

If I could I would invent a time machine and go back to this lecture and tell the camera man to focus on the screen when he’s changing slides 🤷‍♂️

[@747maran]

He was asleep, the topic was over his head

[@philgee72]

for fucks sake don't post this without showing paul davies slides as well

[@PinkasBrown44]

+Phil Glenn yeah, really. Show the slides whn he is talking about the slides. Show the his face when there ARE no slides. Simple

[@123Spinderella]

People have been doing it for over thousands of years.

[@737nathan]

I believe time travel to the past will be possible one day. I know there are a lot of skeptics out there, but all we need to do is look to technologies we have today such as cell phones and think of what a person even just a 100 years would say if you mentioned to them such things will exist. They would be very skeptical and probably even laugh at you. Same goes for space travel or air travel we have today. If you were to go back say even 200 years and were to say we will be able to travel around the globe in just hours in crafts the size of ships, people would not believe or accept that such things would be possible.

[@checkmate440]

Just a thought....

[@yaoming42]

time travel will be possible one day

[@yaoming42]

Time Hater it’s crazy I actually remember typing that comment now 8 years later you reply 😂😂😂

[@yaoming42]

Time Hater probably won’t be possible in our life time but we will see🤷🏻‍♂️

[@yaoming42]

ur so smart tho...i have been thinking about this for days, you dont understand what type of thought you just gave me, lol now i cant get it out of my head

[@michaelkeeble1]

Time Travel will never happen..... I was shocked to find this as i thought youtube ended back in 2074, i guess i was wrong,,

[@aqwertgbvcxz]

The theory of Black Hole doesn't make sense. There are too many contradictions and inconsistencies with the theory. For one, if the gravitational pull of a Blackhole is faster than speed of light then how come the Galaxy is not consumed by the blackhole faster than the speed of light? Milky way should've been consumed by now.

[@superstar6318]

I agree.

[@jessicacarrier9029]

Time maching. Like being locked in a machine gun

[@AltumNovo]

Nonsense, The gravitational field from the neutron star would surly permeate through the wormhole and dilate both ends, stopping backwards time travel from being possible.

[@JarredRules22]

You are basing this on what fact?

[@AltumNovo]

JarredRules22 Why would a gravitational field not permeate through the wormhole? What fact is saying that it doesn't based on,

[@JarredRules22]

+Altum Novo I don't know but have you ever achieved that or is it just a thought in your head like all of this, because none of us really know. We do know that the wormhole would only be as big enough to send a signal or particles through it. So...your move

[@AltumNovo]

JarredRules22 My understanding of physics dictates to me that if a particle can go through the wormhole then so would a gravitational field. No explanation was given as to why the wormhole would be a special case, exempt from allowing gravitational fields through but still letting particles.

[@morningmadera]

I'm gonna go with Novo on this one ...

[@Rob-bh9gt]

wikipedia, google, etc. where is the proof that 1 + 1 = 2?

[@yaoming42]

that is correct finally somebody agrees with me

[@jeffbailey4928]

The simple and definitive answer to the question of “Human Time Travel” is this; we haven’t therefore we never will. This assertion is not based upon astrophysics or quantum physics but rather simple deductive reasoning. Consider the following; if there were a point in the future where time travel became possible, it would of course be highly guarded to ensure it would not be misused (an oxymoron) by an individual or government. Much was the objective at the advent of nuclear weapons, however, time being the great equalizer, in just 74 years nuclear proliferation has created the very real possibility that left to its own demise, humanity will experience a nuclear holocaust. As with any major discovery, be it the combustion engine, flight, PC’s, cellular phones or nuclear weapons, no matter how astonishing it is initially, in time it becomes common and accessible. Thus, if human time travel were ever possible, given our propensity to misuse power, humanity from its conception through today, would be in TOTAL disarray and PERPETUALLY in-flux. We are not, and there- in lays the proof that human time travel will never happen. Humanity has shown that it simply is incapable of possessing such awesome power responsibly and as such, time will forever remain in the realm of an omniscient God.

[@RedVynil]

Time travel's not possible but god is?? Tell that to Preston Nichols!

[@katiekat4457]

He’s funny

[@yaoming42]

Yes i do to believe completely in that, but I am talking about people that suggest the spirits of past dead humans still "roam" the Earth

[@stevekaspar1396]

Time Travel?? We are orbiting around the sun at 66,000 mph...meanwhile, the earth is rotating on its own axis at 1,070 mph..and tilting north and south seasonally as it goes around the sun...as our solar system is rotating around the Milky Way Galaxy at 560,000 mph..while our galaxy is hurtling through space at about 570,000 mph in an expanded universe going ever faster and faster. So, even if you would be able to go back in time a few seconds, let alone years...you would have been in a whole different and incalculable position in space.. and if you could go back in time 100 years you'd have a very long impossible space trip incorporating incredible calculations to get there lol...Einstein said that 'space/time' is one and the same.. Time Travel as a concept is patently false therefore. So.. explore Time/Space travel if you wish.. but.. save your time...take 'time' to ponder what I just said.

[@checkmate440]

UFO's are time travellers

[@mariastrikwerda3074]

Don't we all 'travel' in the future every day? But as long as there is no way back...it is not really traveling, now is it? Generally I think these kind of discussions are just a waste of brain matter. This is just stupid and a disgrace for any 'scientist' to be spending time on.

[@av733]

38:08 Uh oh, he is not one of those religious types is he?

[@jimcurdy]

I buy every book Davies writes, all. But, man, he's a terrible public speaker and that damn hand-held camera work is the pits! Never got to see the phone boxes.

[@holgerjrgensen2166]

NO, absolutly NO, there is NO time travel, for that simple reason, that time is result, of the travel, time is the Shadow of Motion. Grow up.

[@jamessaine2929]

All you did was prove that can't be made

[@yaoming42]

well i honestly am not sure because there are a lot of fakers out there

[@steveo6332]

a lot of BS here, call it optimistic thinking or ill informed.. sally traveling a year away and back at the speed of light nets 0. traveling away time relatively stands still, but the return it doubles.. still 2 years.

[@steveo6332]

Ok, say Sally travels away to some celestial body and then back so we observe it takes exactly 2 years.. how far away would that object be?

[@steveo6332]

The "speed of light" is a misnomer, what it truly is a time-distance factor for awareness; an interaction of each particle effect on all others. See Heisenberg's uncertainty principle. Your "gamma" exists regardless of any speed in which she travels.

[@scarakus]

I have a camera that records 10 minutes into the past.

[@Webfra14]

no slides, no view, good bye...

[@mycount64]

into the future ... yes, into the past no ... the atom that travel into the past already exist there... that is a big problem.

[@vshah1010]

Time just exists. You can't "travel" in time. That's nonsense.

[@alanross1117]

oh

[@alanross1117]

btw, we are travelling in time al thel time ... forwards

[@5starcomment]

profundity...

[@miroru1]

The past does not exist. The future does not exist. So you can not go there. Only the present moment exists everywhere. The present moment transforms to the next present moment. The past is not archived anywhere. The future did not happen yet.

[@PASHKULI]

blah-blah nothing serious on the subject in this video

[@TheRedemption77]

crack pot