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    Thread: The possibility of time travel

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      Member benzene's Avatar
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      The possibility of time travel

      Well I've always liked the idea of time travelling since I was a child (although as I'm only 15, it's not really saying much haha), and last night an idea came to me in a dream that could, given the right circumstances, allow time travel to happen. Now I don't remember the dream very well (despite my normal dream recall to be very good) but when I woke the idea was clear and very sensical. The idea is this: If you accept the possibilty of a multiverse made up of googolplexians of parallel and alternate-ending universes, there would be an almost certain possibility of that inside one of them, evolution started say an hour earlier than in the universe we presently reside but otherwise identical. If, by some amazing twist of fate, someone managed to travel to said universe, the person would (practically) be one hour in the future.

      If such a thing is possible, it opens a whole load of questions to be answered, I mean, your family and friends would still exist in the alternate universe, identical in every way to the person you know in your home universe, but it wouldn't quite be them...would it?
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      Yup. If that theory is true, then yup.

      Now, let's make a machine that takes us to alternate universes. (See that's the easy bit, now that the theory is sound)

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      How would you know which universe to go to? You think you've found the right one, everything looks normal, as it should be... then BOOM. A T-rex eats your family.

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      Here's the slightly more realistic possibility of time travel: if you were to take a spaceship to a black hole and hover above it for awhile, and when you then return to earth, you will notice that say a thousand years have gone past. Try not to get sucked into the black hole though, that may end painful.

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      Quote Originally Posted by Spartiate View Post
      How would you know which universe to go to? You think you've found the right one, everything looks normal, as it should be... then BOOM. A T-rex eats your family.
      Haha, yeah that's kinda the problem, you wouldn't. There are a lot of if's and but's with this theory, but it still prooves that time travel is possible.

      Quote Originally Posted by Hot Chocolate View Post
      Here's the slightly more realistic possibility of time travel: if you were to take a spaceship to a black hole and hover above it for awhile, and when you then return to earth, you will notice that say a thousand years have gone past. Try not to get sucked into the black hole though, that may end painful.
      How would that work? Time is not a physical object like light that can be sucked into a black hole.
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      Quote Originally Posted by benzene View Post
      How would that work? Time is not a physical object like light that can be sucked into a black hole.
      It's Einsteins theory of general relativity. Matter warps time and space. For small objects the effect is not notable, but for massive objects, like black holes, it is noticeable. When you're near a massive object time will proceed slower than when you're not. It works with speed to, if you travel at a reasonable portion of the speed of light, time will proceed slower as well.

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      Stephan Hawking said that if you can travel fast enough to go near lightspeed, then time inside your shuttle would slow down, as to not break the laws of physics and break the speed of light. If you went 99.999% light speed, and stayed there for, say 6 years (the vehicle's time) then the people inside the vehicle will have aged 6 years, while poeple outside the vehicle will have aged more, therefore, you essentially travel forward in time.

      No need for alternate universes/extremely complicated modes of travel. Just go really, really fast!

      (I saw this on The Universe on the discovery channel. See!? T.V. does teach you things!
      Last edited by Burke; 05-29-2010 at 11:23 PM.
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      Quote Originally Posted by Burke View Post
      No need for alternate universes/extremely complicated modes of travel. Just go really, really fast!
      You still can't go back in time though.

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      He said something about that too, i just can't remember it
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      Quote Originally Posted by Hot Chocolate View Post
      It's Einsteins theory of general relativity. Matter warps time and space. For small objects the effect is not notable, but for massive objects, like black holes, it is noticeable. When you're near a massive object time will proceed slower than when you're not. It works with speed to, if you travel at a reasonable portion of the speed of light, time will proceed slower as well.
      That makes sense, but peoples perception of time is pretty much all in their head, so how can they tell if time is going faster or slower than the normal? Also, by incresing the speed at which your neurotransmiters move, people can experience time as if it were moving slower than normal, I've experienced this personally while juggling

      Quote Originally Posted by Hot Chocolate View Post
      You still can't go back in time though.
      What if using my theory, you went to a universe where evolution started an hour later then here, sure getting there and finding out what universe to go to would be a problem, but given how much technology has excelled in the past 100 years, it could be possible.
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      Quote Originally Posted by benzene View Post
      That makes sense, but peoples perception of time is pretty much all in their head, so how can they tell if time is going faster or slower than the normal? Also, by incresing the speed at which your neurotransmiters move, people can experience time as if it were moving slower than normal, I've experienced this personally while juggling
      Actually there is a fundamental notion of time, our perception of it is however indeed wrong. There are certain particles for example that always decay in the exact same time. If you took one of those particles and place it near a massive body, it would decay slower.

      Quote Originally Posted by benzene View Post
      What if using my theory, you went to a universe where evolution started an hour later then here, sure getting there and finding out what universe to go to would be a problem, but given how much technology has excelled in the past 100 years, it could be possible.
      If such a universe exists and we'll be able to go there, than yes, it would be possible.

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      Retired Post Whore-73PPD jarrhead's Avatar
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      The space-time relation is truly mind-blowing.

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      Quote Originally Posted by Spartiate View Post
      How would you know which universe to go to? You think you've found the right one, everything looks normal, as it should be... then BOOM. A T-rex eats your family.
      Or you find out everyone in your family is a satanist-assasin, and that somehow Chuck Norris is your godfather.

      Who the hell am i kidding? I'd rather go there than the past!
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      If you want to go into the future, I'd have to say that building a really fast spaceship is much more practical than trying to go to a different dimension. If you only wanted to skip ahead an hour, you wouldn't even have to go terribly fast (not sure how fast space ships can go), but you might be in your ship for a while.

      Quote Originally Posted by benzene View Post
      That makes sense, but peoples perception of time is pretty much all in their head, so how can they tell if time is going faster or slower than the normal? Also, by incresing the speed at which your neurotransmiters move, people can experience time as if it were moving slower than normal, I've experienced this personally while juggling.
      Believe it or not, they've actually done an experiment proving time dilation. They synchronized two clocks, then left one on Earth and sent the other one on an airplane. When they landed the plane, the clock on the plane was ever so slightly behind the clock that had remained on Earth. The difference was what they had predicted based on the differences in gravity and velocity between the two clocks.
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      Now they need to test this with the new space aircraft the air force has.

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      The thing is, is that its probably easier to just travel back into time than to travel into another universe. So it doesn't really solve anything.

      As others have pointed out, we already know how to travel forward into the future, which just requires you to go fast enough. However, going backwards is an entirely different matter.

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      Believe it or not, we ARE time travellers. Here's why:

      We are on the Earth, which is a planet, and it's big. Very big.
      Therefore, the Earth distorts time, and everything on the Earth is with that distortation.
      Because of this, Earth time is slightly behind Space time.
      Which means, we are time travellers!
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      OP, where does your theory come from? I assume it's a bastardization of M-theory? If that's the case then you are right, but traveling between universes is impossible, as they don't exist in the same brane vibration. The math quiet easily shows that any attempt to traverse a vibrational frequency will destroy both universes.
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      Quote Originally Posted by hgld1234 View Post
      Believe it or not, we ARE time travellers. Here's why:

      We are on the Earth, which is a planet, and it's big. Very big.
      Therefore, the Earth distorts time, and everything on the Earth is with that distortation.
      Because of this, Earth time is slightly behind Space time.
      Which means, we are time travellers!
      Not quiet, time dilation is not the same as time traveling. And the earth is not big enough to distort space-time in any noticeable way. Maybe a microsecond over a billion years. Interesting thought though, someone calculate the difference between earth time and space time.

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      Quote Originally Posted by ninja9578 View Post
      OP, where does your theory come from? I assume it's a bastardization of M-theory? If that's the case then you are right, but traveling between universes is impossible, as they don't exist in the same brane vibration. The math quiet easily shows that any attempt to traverse a vibrational frequency will destroy both universes.
      Sorry Ninja, I'm only 15 and my highest qualifications are mostly A's in GCSE's and I don't know what M-theory, a brane vibration or traversing a vibrational freqency is, but I'm willing to learn if you would explain it to me?
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      wheres all the dvers coming in to say travel to the past is impossible because the past no longer exists? Its just an illusion created by the memories in your mind and the study of history. Ive heard that so many times on here by now lol.

      I guess it doesnt have to do much with your theory though, since yours is about trans-versing universes. However, ninja covered that Who knows, maybe some startling new scientific revelation will change that even.
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      What exactly can "travel" through time? I think for something to be able to travel time, it must be independent from it. If it is your own body or a the space shuttle you fly in, then they are part of space and time. So does it make sense for space to travel time? It can't really occur.

      Thus, if it is beyond space, it is also beyond time.

      Apparently we can re-experience past-experiences through hypnosis, but when it comes to experiencing the future, it could only be known as an approximation or prediction. No dimensions of time actually exist.

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      Quote Originally Posted by tkdyo View Post
      wheres all the dvers coming in to say travel to the past is impossible because the past no longer exists?.
      They got scared when I started explaining the current theories of the universe

      Quote Originally Posted by benzene View Post
      Sorry Ninja, I'm only 15 and my highest qualifications are mostly A's in GCSE's and I don't know what M-theory, a brane vibration or traversing a vibrational freqency is, but I'm willing to learn if you would explain it to me?
      You can learn the basics of M-theory from this show by the BBC: http://www.youtube.com/watch?v=F-yEu-b_YD0. The theory has changed slightly since then and obviously it's far more complex than that, but it takes an understanding of relativity, quantum physics, and a firm grip on multidimensional calculus, to understand it in any kind of depth.

      Quote Originally Posted by really View Post
      What exactly can "travel" through time? I think for something to be able to travel time, it must be independent from it. If it is your own body or a the space shuttle you fly in, then they are part of space and time. So does it make sense for space to travel time? It can't really occur.

      Thus, if it is beyond space, it is also beyond time.

      Apparently we can re-experience past-experiences through hypnosis, but when it comes to experiencing the future, it could only be known as an approximation or prediction. No dimensions of time actually exist.
      Actually, exactly one time dimension exists


      The math shows pretty inconclusively, that traveling backwards in time would instantly destroy the universe. Here is a lay-mans way of putting it: If you somehow open a portal to the past and move something there. The past suddenly has more mass/energy then it did when we were really there. And that mass and energy stays there, so next time around, when the portal is opened, even more mass/energy gets added. It's like holding a microphone in front of a speaker, the power amplifies very rapidly. If you did that in a universe, the mass/energy within the universe would instantly go to infinity, destroying the branes that our universe is in.

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      peaceful warrior tkdyo's Avatar
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      Quote Originally Posted by ninja9578 View Post
      They got scared when I started explaining the current theories of the universe


      Actually, exactly one time dimension exists


      The math shows pretty inconclusively, that traveling backwards in time would instantly destroy the universe. Here is a lay-mans way of putting it: If you somehow open a portal to the past and move something there. The past suddenly has more mass/energy then it did when we were really there. And that mass and energy stays there, so next time around, when the portal is opened, even more mass/energy gets added. It's like holding a microphone in front of a speaker, the power amplifies very rapidly. If you did that in a universe, the mass/energy within the universe would instantly go to infinity, destroying the branes that our universe is in.
      lol I must have missed that one, good for you

      hey that second one sounds like a good way to save the universe in the future when thermodynamics takes hold and theres almost no flowing energy left!
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      Retired Post Whore-73PPD jarrhead's Avatar
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      No tkdyo, cause think. If somebody were to open a portal to you right now, then the portal would open an infinite number of times from when we travel to the further point in time and he comes back again. Instantly everything goes boom.

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