The Universe season 5 episode 4 - Time Travel [Full Length]

[jackknife0001]

Maybe the universe is expanding faster because the matter inside the universe is rushing out to fill in the space outside the universe. Just like how a balloon expands in space and explodes.

[QuickRefs]

@jackknife0001 What if the universe doesn't exist at all, and what we see is an illusion? Then there is no reason to explain why it accelerates.

[mrdrumsauce]

@QuickRefs good call, you can test this theory by accelerating yourself into a brick wall, report your findings to the group, we'd like to know if that brick wall is really there

[QuickRefs]

@mrdrumsauce If you accelerate yourself into a wall, you could die. But if you do, that means you were, at some point, alive. But then you cannot be alive in the universe that doesn't exist. Furthermore, you will not die if you do NOT accelerate yourself into a wall.

[killameh34]

@QuickRefs philosophy bullshit.

[killameh34]

does a black hole bend space & time??? I thought it was was an optical illusion...Like the hot air above a fire...

[QuickRefs]

@killameh34 Try to get close to a black hole and tell me if it does. I'm curious about that too.

[killameh34]

@QuickRefs Ha! I'd have to be smoking a pound of Marijuana before I would ever do something fucked up like that.

[teddorward]

you can unscramble an egg, on film,so if we are perceiving this as the present.is watching the rewind of a video,,,undoing what was done in a virtual optical world,,, whoop i blew your minds! lol wtf ever

[andielines]

nah this is bollocks. it makes me laugh when so called physicists accept nonsense to prove their theories correct. but cant except counter-intuitive 'alternatives'.

far too selective and not at all scientific

[slyjokerg]

@andielines what makes ME laugh is people like you calling people that actually are physicists, "so called physicists," simply because you either don't understand what they are saying, or don't like it. you calling what they say, "nonsense," is like you telling kobe bryant how to play basketball, or gary kasporov how to play chess.

[xoio]

@andielines - Like what? - Explain yourself...

[xXDEICIDE216Xx]

Blackholes. Could we possibly have come from the backside of one? I mean, we dont know exactly what happens as all equations break down. Its kinda been a curiosity of mine lately.

[slyjokerg]

@xXDEICIDE216Xx i find it beyond possible... more like, likely. what the big bang was fits pretty perfectly with the notion that a shitload of energy/matter was constricted down to a nearly infinitely small, infinitely dense little speck, in volume. think of a grain of sand weighing 900 trillion tons. now picture it being spongy in its reduced size, being forced thru a nearly infinitely small hole, and once thru BOOM!!! it re-expands in a huge explosion of release, via a white hole = big bang.

[xXDEICIDE216Xx]

@slyjokerg I know right? I know others have thought about this concept. I tried to search to see what others thought and apparently I suck and get lost quickly when numberss get thrown around like ragdolls.

[slyjokerg]

@xXDEICIDE216Xx yeah, the numbers involved are a problem for people. once they get as big as they are, they start to lose meaning. that's why i try to limit the number of specific numbers mentioned when talking about it, and focus on conceptualizing it in terms that register with people. it is hard for people to grasp what "800000 light years" means, etc... but they can picture a nerf football being condensed down and jammed thru a straw, popping back into shape after coming out the other end.

[kickniko]

Gödel found the first solution having closed timelike world lines in GR. This shows that in principle time travelling is quite possible in this theory, no matter if "we can find enough energy" etc. There are practical but no theoretical problems for time travels in GR.

Now, one may consider this to be "paradoxical" for the physical world, but as a mathematician I don't expect the world not to be "paradoxical" just to satisfy my expectations. A paradox is no problem if the equations are OK. ;-)

[DonMega187]

"nature makes time travel impossible"? so einstein was right but nature just doesn't like the idea? simply put it would sound more like einstein was wrong, but they're too afraid to mention it in this manner. and how do they know those atomic clocks simply haven't been put out of tune by something in space compared to the clocks that remained back on earth? making too many assumptions without taking into account other variables is risky

[slyjokerg]

@DonMega187 there is no evidence the clocks were put out of tune. it is baseless speculation, looking for a foundation. we do know clocks are testably "behind" when they "come back," in the type of scenario mentioned. and the real time observable reality OF those clocks has no demonstration of any flaw. and it fits perfectly with GR, among other ideas.

[Puniksem]

There is a scene 33 minutes into this video that uses a previously shown animation of a fire working it's way up a corridor of a space craft, yet this imagery has been used again to visualise something to do with time travel and exotic power sources, are we actually just re-using the animation sequence to pad the video?

[Noganrhy]

I find it amusing that four people were like..."Ahh...I dont like time travel" ^^

[tonebone8]

what i cant seem to wrap my head around is how, rather, what is the difference between travelling back in time and putting a bullet in your head

[tonebone8]

@tpgangz ufos?

[momchil21]

Maybe someday I will travel between the stars, If humanity does not destroy itself

[tpgangz]

i could stab them with my stick.. if my grand father will back..sometimes too much open minded makes people imagining the most weird things.. if the time machine was invinted maybe theres a people from future who visiting us right now.. but there nothing..

[MrDBarch]

I think the best way to travel at the speed of light is to make spaceship out of light and then get in it, and turn it on! or better yet, make an engine out of light and stick it in the space shuttle ZOOOooOOm!

[MrDBarch]

200 years from now, humans will laugh hysterically at our 21st century obsession with worm holes and time travel. We'll most assuredly discover a way of traveling REALLY fast in outer space by then, OR, we'll finally realize that we don't have anywhere to GO TO in outer space! Probes and robots will be the future astronauts....

[KayneKura]

28:32 Tesseract!

[royce12ful]

i thing time resets itself so the timeline doesent ulra

[jefersonvilaede]

just shoot that old man! shoot him in the face, lets see how im not changin the past then!!!

[Brenz347]

ok. in the begining there was darkness & then BANG. But what BANGED ??? Thats what nobody can answer. where did the two particals that banged together come from ?

[olmecbones]

What if we had Star Trek Transporter type technology. If we could build a computer and related machinery that was powerful enough to record your present physical state, destroy your body, store the information for a thousand years (or whatever) and then recreate your body in the future, will you have become a time traveler?

I believe that transporter type technology will be possible in the future, by the way, because the means to achieve it are very conceivable according to what we know today.

[MilitaryMan006]

The third theory is incorrect 'Back to the Future' says so

[schwarzfalk]

10:09

LOL...anyone else here think that the 3rd explanation is borderline religious?

(plus makes no sense. what if the guy tries to kill his grandpa - will "nature" somehow prevent even a very determined chap from doing so? seriously)

[bestperson1234]

@schwarzfalk no not really, its just natural cause and effect, if you throw a rock at the ground your action prompts natures reaction for it to bounce back, just as if you were to try and change the past with your action, nature would react back to it and stop it, because that is how physics works, theyre not implying that any intelligence comes from the fact that nature does it

[schwarzfalk]

@bestperson1234

even in that statement you're speaking of nature as if it had a sentience of sorts ("nature would react back & stop it"). the analogy with the action-reaction thing is dubious as best, as newton's laws are a tad simpler (vector F === -F) than the universe somehow "correcting" an event if you just consider the EXTREME complexity implied (when you take into account the zillions of possible scenarios that each would - somehow - have a "fix". seriously?). in short, bad example

[schwarzfalk]

@bestperson1234 or to go back on the previous example, what if he tries to kill his grandpa (say with a gun) - will nature somehow cause the gun to get jammed? but then again he could always pull out a knife & stab him - will nature then make slip on an unnoticed banana peel, or make him stab the guy right on the spot where the chest is protected by a conveniently placed wallet?

or what if he hires a gang of hitmen - will nature then guide a bunch of cops on patrol to this area at this moment?

[schwarzfalk]

@bestperson1234 (dang this 500 word limit) furthermore this "explanation" posits at least two types of events, one which is significant enough to warrant "correction" and the other which ain't. that alone is preposterous, from a purely scientific point of view - in this universe (vast space, u know) how is the murder of a person fundamentally different from, say, a rabbit nibbling a piece of carrot or a fly blowing a fart? lol

[bestperson1234]

@schwarzfalk Yeah but dude your still implying that the universe has some sort of intelligence, or a choice in what it does, to the universe, any of these actions is no more signifcant than a star being blown up, a rabbit farting is no more significant and no less. its just the fact that anything that will break the rules of the universe will be corrected. if a rabbit farting somehow changed the timeline, then the universe would correct that in a similar manner in that it would correct this

[schwarzfalk]

@bestperson1234 um no if you didn't notice, it's the bloke in that episode who's implying that the universe has intelligence, and so are you if you concur with him

case in point, you are talking about "significance". what the hell? from a scientific p.o.v, WHAT is significance? who gets to decide what is "significant" & what isn't?

[bestperson1234]

@schwarzfalk no, no one in the video implied it has intelligence, that is your conjecture and what youve taken from the video because you cannot understand that concept of the universe correcting itself without assigning intelligence. the universe does not need to have intelligence for it to be able to correct itself, it corrects itself because it adheres to a certain set of rules that cannot be broken. you are also the one who mentioned the significance

[schwarzfalk]

@bestperson1234 @bestperson1234 actually it does not need to "correct itself" since there is nothing to "correct", that's just circular logic & you're essentially begging the question. also I said a murder is no more significant than a rabbit fart, not the other way around (this comes to the same though). now you seem to assume that EVERY event is somehow a "mistake" that needs to be fixed, lol ^^

[bestperson1234]

@schwarzfalk no one gets to decide what is significant, thats the point, you say a rabbit farting is no more significant than the murder of someone, a rabbit farting is also no more significant to the universe then an entire star exploding, my point is it doesnt matter how small or large scale the event, the universe will still correct it because it applies to a certain set of rules, it will change the timeline because that murder affects everything and is integral to the structure of the uni

[schwarzfalk]

[cont] because you see, a rabbit blowing a fart DOES change the timeline: it would alter the position & velocity of surrounding molecules & change the local (global actually, though on a smaller scale) composition of the atmosphere

well guess what; murder also changes the timeline, and so does a nuclear holocaust: alters the molecular composition & layout of space, locally. on a somewhat vaster scale perhaps, but kinda irrelevant considering the size of the universe, ain't it? :|

[bestperson1234]

@schwarzfalk it all does matter, the universe takes the easiest route to change things because thats how nature works, evolutions adapts to change in the same way and evolution is in no way the means of intelligence, even though it works on the physicalities of semi intelligent beings

[schwarzfalk]

@bestperson1234 good! in that case you must accept that murder (as an example) ain't much of an event in the universe, thus not something that "needs" to be "fixed" - remember that in evolution theory the individual has absolutely NO importance, only the survival of the collective (species) counts. ants are a fine example of this :D

it's not the universe that changes things, it's things that change the universe (change happens, shit happens, etc etc)

[bestperson1234]

@schwarzfalk for example imagine a kettle boiling, the heat causes the water to evaporate and it finds the needs to escape, it will not escape in any other way but the hole provided, making a screeching sound, this is because this is the only way for it to go, this is the only option according to the laws of the universe, the same is applicable for how the universe corrects itself, to it, making sure the past never changes isnt weird, its just what happens, well this is what i think anyway lol

[schwarzfalk]

@bestperson1234 again, dubious analogy. you assume the kettle is open & the water "needs" to escape. you assume the altered events are a "mistake" that somehow "needs" to be "corrected". from a scientific point of view they ain't. Hitler's genocidal rule would be no more of a "mistake" than an egalitarian libertarian utopia

this is cause & effect, ALL events alter the universe on some scale

change IS how the universe (timeline) works. without change, there'd be no *time* line would there?

[bestperson1234]

@schwarzfalk it does need to be corrected, or it wouldnt make sense, the fact that you still exist when you go back in time wouldnt happen at all unless something was corrected, such as your grandpa always eventually meeting your grandma, these need to happen, or the fact you travelled back in time wouldnt happen in the first place, and no i do not assume that the altered events are a mistake, the universe is just taking a different route to suit the changes that have happened

[schwarzfalk]

@bestperson1234 and the grandfather paradox can be explained via other means such as 1) traveling to an alternate universe when going into the past, thus killing an alternate self (remember that if you travel into the past, then you no longer exist in your own timeline) or 2) you simply disappear in a poof of logic once you do the deed, which again ain't a "mistake" (the universe gonna survive fine without you :D)

as I said, the universe fixing every possible scenario is borderline supernatural

[bestperson1234]

@schwarzfalk even so man, assuming the universe has an intelligence is not even semi religious or unbelievable to assume, the fact that life like us exists is spectacular itself, it could seem religious to a non sentient object if that were possible, therefore the idea that the universe might be intelligent is not so....fuck it dude i just wrote an essay lol ill stop here

[schwarzfalk]

@bestperson1234 alrite I can accept THAT explanation, but the universe having some sort of intelligence is also the basis for (almost) about every religion out there. heck even Marvel Comics uses this :D (there the universe is called Eternity, it's sentient & it's the cosmic abstract embodying the timeline ie. the universe)

[heartlessvietboy]

Stop the balogny. I want to hear rational facts not unsupported (unproven) claims.

[goatcheese1984]

Just saying, time travelers would be killed! Not by travel, but by what you find.

[385005]

is it possible to disintegrate forward in time that way i think u can also disintegrate back in the past?  how much power would it take to power a ship that could reach Alpha Centauri in 200 years.

[385005]

is it possible to disintegrate forward in time that way i think u can also disintegrate back in the past?

[PYTHAGORAS101]

Nobody in this video seems 2 know what time actually is .They assume there is only one time line .They think in terms of past, present and future .Its not like that at all .

[inagod]

maybe we owe our existent to a black hole,the fact they seem to be at the center of every galaxy including our very own milky way.Who knows,aliens may be visiting earth,but cannot interact because of some paradox that exists on time travel,so they can only observe us,while for us it is difficult to see them,again because of some law of physics we don't know as of yet

[kimbobrand7]

chuck norris can unscramble egg

[TimeshipStudio]

This is very informative, thanks, though there might be many more (even unknown-to-us) ways to travel in time ;-)

[AHeckman118]

If there are time travelers, why haven't we seen them yet? Conundrums :D

[baalisgod666]

@AHeckman118 How do you know they haven't seen you?  :D

[AHeckman118]

@baalisgod666 i set traps :D

[inagod]

@AHeckman118 maybe within the laws of physics,a paradox exist's that makes them unable to interact,they can only observe,which seems to be the case.

[mrbordem1819]

wouildent b more simple to make space move around u instead of moving faster then space

[Experik]

Nothing exploded, it has always been there.. thats my opinion

[iPhone4aple]

we need more einesteins, he is an absolute genius! I wouldn't personally like to time travel into the future however, i'd love to go in the past!

[BabyOxide]

as a 3rd party watching, u will see me fade in and out of existance @ t10, bcos of the paradox, (assuming this is instannt effect), if the time has to live it out base on the actual linear of time flow, then at t10 u see me disapper, at t20, u see me reappeaer, at t30 i'm gone and t40 i reappear...

[BabyOxide]

from t=0 (dad lives), t5= i'm born, t=10 (go to t0, kill and return), t10=t0, dad dies,t15=t5,i wasnt born, t20=t10=t0, i did not go back to kill, i do not exists, dad lives, t25=t15=t5, i was born, t30,=t20=t10, i exists again,

so at t10 i exist until t20 and disappear, at t30, i reappear, and live till t40 and disappears and at t50, i reappear.... so on and so forth

[BabyOxide]

before i wiped out by myself.. bcos it takes 10t for my to kill my dad, and then the paradox sets in, and takes 10t for i would exist again and 10t that i wouldn't

so my life gets looped within that 10t, it would not be instant, (ripple effect)

eg: every 10t, i relive my life...

[BabyOxide]

I have a theory that the grandfather paradox may acually be possible.. supposed we count Time as a linear flow of events at time=5, i am born @ t= 10, i time traveled back to kill my father @ t= 0, (i killed my father) from t = 0 to t =5, that is 5t that my father still lives from t=5 to t=10 that is another 5t that i lived and my dad isnt dead thus from t=0 it would take 10t for the events to occur after i killed at t=0 i return to t10, (supposedly) i can lived up to t=20,

[BabyOxide]

ponder this ..

Part B left on earth,, (500 years old)

Part A went for a roundtrip (45 days old)

when u return... part B WOULD still be there waiting for you...

you travelled for 45 days and appear 500 yrs into the future..

but for that period of days, part B would still age together as the earth the other end of the machine...

unless the wormhole is constantly kept opened ? but that still means that the worm hole one one end is aging faster then the one on the other end.

[PShepdog]

I went to the future but no one was there??? So I came back to the past to find you. I thought , your not here because the future hasn't happen for you yet.

[jaroncreed]

this is so fucking interesting i can't stop watching these videos damn History Channel for ending this show!!!

[MrGouini]

FIRST HOW ON THE FUCKING EARTH CAN WE SPACE TRAVEL...noway of going back to the past...or to the future...they say these things just to earn money from donations....WAKE UP !!!!!!!!!!!

[Jordyjg]

lol, first there was nothing, then nothing exploded, then there was everything, but were just nothing...

[BraveManNewWorld2]

@Jordyjg ... hahahahahaha :)))

[Kyros]

@BraveManNewWorld2 I'd like to press my asshole against your lips and let my bowels loose in your mouth.

[tubecrapable]

@Jordyjg Brilliant theory! lol *sigh*

[Utilizator554]

@Jordyjg

ofc there was god wich was made of no matter and he thought as there was a period for no universe and the universe if he thought there was dynamics so there was a time if the time existed u can't disprove that energy also existed for ever and anything u can make god of can be viewed as energy or matter oh please people it's 21 already no time for god created this stuff plz

[brightingsky2009]

@Jordyjg Thats a good one! But matter does exist mostly out nothing

[Noganrhy]

@Jordyjg lol...

[d1versify]

what you do if you stay outside a black hole for 2 weeks then go back to earth , where 500 years have passed and you cant anyone? :P

[jaroncreed]

@d1versify i'd stay by that blackhole for a month let 500 years pass and maybe by that time people won't believe fairy tales like the bible anymore

[d1versify]

@jaroncreed i wanted to say that ... what if you come back to earth after 500 years and there is no NASA, no control station for you to land the spaceship, no human race lol :P

[jaroncreed]

@d1versify you'd be fucked in a race of reptilian humanoids

[351xb1973]

@d1versify

Didn't you ever watch Planet of the Apes? That's how the movie begins.

[d1versify]

@351xb1973 no i was busy sitting on the edge of my chair :P

[JOSEENUNO]

@351xb1973 Indeed =) Btw, the "Planet Of The Apes" was nothing but time travel... the difference was: what we thought to be the past was, in fact, the future - after the human race f.... up the planet - a vision that makes sense (up until a certain point...)

[DanielDouradoF]

Wow, thank you for this upload!!!