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Time Travel

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Old
06-24-2012, 09:34 AM
  #26
Mike Emrick
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Originally Posted by Unaffiliated View Post
"If time travel is possible, then where are the tourists from the future?"
Again, THE KNOWLEDGE has come from the future. To date, he is the only known person to do so.

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06-24-2012, 09:37 AM
  #27
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Originally Posted by CloweForbidzYou View Post
time travel would create a complicated problem. If you built a time machine, it is likely because you have something in your past you would like to change.

When you go back into the past and fiz it, you no longer have the problem in the future, meaning you dont create the time machine, by not building a time machine you have that problem and so on.

It would work the same way as using one.
I always thought the easy way around that would be to go further into the past and invent it before the occurrence of what you wanted to change.

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06-24-2012, 09:55 AM
  #28
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Time travel is practically impossible to conceive. It's as far away of a dream as traveling at the speed of light.

I prefer thinking about what we would do with time travel, rather than thinking how we could do it.

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06-24-2012, 11:55 AM
  #29
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Originally Posted by Stjonnypopo View Post
Time travel is practically impossible to conceive. It's as far away of a dream as traveling at the speed of light.

I prefer thinking about what we would do with time travel, rather than thinking how we could do it.
Actually it's not. Michio Kaku explains that it's perfectly conceivable.

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06-24-2012, 11:59 AM
  #30
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If the future is anything like futurama, I am in.

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06-24-2012, 12:49 PM
  #31
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All I would need is tomorrows lottery numbers.

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06-24-2012, 01:21 PM
  #32
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Depends on how the universe actually works.

The whole "destroy the time machine before it is created" problem (the grandfather paradox) is avoided by the many-worlds interpretation of quantum mechanics. For every quantum event ever with non-zero probability, there is a universe.

So you would step into the time machine and reappear in the past in the parallel universe where the "you" killed the other "you" before you had the chance to make build the time machine.




I like these paradoxes.
Another good one is: what if you were given the ultimate secret to the time machine by a mysterious stranger in your youth, and then returned to the past near the end of your life to give the time machine to your younger self? Where did the idea for the time machine come from?
see i believe there is only one universe, because every outcome is predetermined, because of the brain.

its very difficult to explain, but our brains have predetermined responses to every situation possible. there are no other outcomes, because our brain has already selected the outcome.

i know i didnt explain it well, but i'll try to give an example

say a girl asks you to dance, and you say no. latter on you wish you had said yes. you wonder what it would of been like had you said yes.

well it was never a possible outcome, your initial response was no, and you didnt regret it til afterwards. in order for your brain to say yes, it would first of had to say no.

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06-24-2012, 02:02 PM
  #33
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06-24-2012, 02:11 PM
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Originally Posted by Unaffiliated View Post
Depends on how the universe actually works.

The whole "destroy the time machine before it is created" problem (the grandfather paradox) is avoided by the many-worlds interpretation of quantum mechanics. For every quantum event ever with non-zero probability, there is a universe.

So you would step into the time machine and reappear in the past in the parallel universe where the "you" killed the other "you" before you had the chance to make build the time machine.




I like these paradoxes.
Another good one is: what if you were given the ultimate secret to the time machine by a mysterious stranger in your youth, and then returned to the past near the end of your life to give the time machine to your younger self? Where did the idea for the time machine come from?

In other words, you're not traveling backwards in time. You're just traveling to a parallel universe, which is not at the same time as your own universe. Hence, it's not time travel. It's parallel universe travel.

Forwards time travel is possible (as we're all doing it right now as time only requires motion). Backwards time travel is a whole other ball game and not one single explanation out there has yet logically resolved the grandfather paradox (and as I stated, traveling to another parallel universe is not time travel).

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06-24-2012, 02:19 PM
  #35
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Originally Posted by Uncle Howie View Post
Energy cannot be created nor destroyed... if you believe in that statement, than you must believe time travel is not possible as you would be "destroying" energy from the current time period and "creating" new energy to where ever you end up future/past.
That's not true even if your first sentence was true. We are traveling through time right now. We're all traveling forwards in time right now. That means your 2nd sentence has a glaring error in it. Time requires motion. The faster you go, the slower time gets. Although, motion requires energy.

Besides, I thought it was matter that could not be created nor destroyed (which might or might not be true). It just changes forms (like matter into energy or energy into matter). Anyway, seeing enough space shows, there's now a theory that something can arise from nothing. Hence, matter (or energy) can be created from nothing.

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06-24-2012, 04:15 PM
  #36
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Originally Posted by someguy44 View Post
In other words, you're not traveling backwards in time. You're just traveling to a parallel universe, which is not at the same time as your own universe. Hence, it's not time travel. It's parallel universe travel.

Forwards time travel is possible (as we're all doing it right now as time only requires motion). Backwards time travel is a whole other ball game and not one single explanation out there has yet logically resolved the grandfather paradox (and as I stated, traveling to another parallel universe is not time travel).
But there is a universe split for every quantum event of non-zero probability (ie: all the time). Logically, doesn't that make forwards time travel parallel universe travel as well?

Maybe we can define and quantize time itself as universe splits.



edit: to make it clear, I have pretty limited formal education in this area. Although I will have more after my next term.

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06-24-2012, 04:17 PM
  #37
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How am I the only one to bring up Back to the Future? I'm disappointed.

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06-24-2012, 04:17 PM
  #38
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Originally Posted by Landeskogien View Post
If the future is anything like futurama, I am in.
You mean full of immature/unfunny jokes?

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06-24-2012, 04:19 PM
  #39
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You mean full of immature/unfunny jokes?
Cyclopes are bad news as well.

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06-24-2012, 04:39 PM
  #40
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Originally Posted by Jarnkrok View Post
You mean full of immature/unfunny jokes?
Are you talking about Futurama? Because Futurama is one of the funniest shows on television.

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Old
06-24-2012, 06:56 PM
  #41
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Quote:
Originally Posted by Franck View Post
If I have understood popular physics correctly, travelling forward in time is just a question of travelling fast enough. The time on Earth would pass much faster than on a spaceship travelling at the speed of light.

Travelling backwards in time is probably impossible though.
This is spot on. Time travel is possible but only in the context of a vessel traveling at the speed on light, on which the people would age at a slower pace than the surrounding atmosphere. Einstein's theory of relativity at work.

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06-24-2012, 07:40 PM
  #42
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Originally Posted by brtriad View Post
This is spot on. Time travel is possible but only in the context of a vessel traveling at the speed on light, on which the people would age at a slower pace than the surrounding atmosphere. Einstein's theory of relativity at work.
This is inaccurate. Reaching the speed of light (not possible) is not necessary for time dilation.


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06-24-2012, 07:58 PM
  #43
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In Lehman's terms? From what I've read, it's impossible for something to reach the speed of light, so when a vessel is pushed towards that, time slows as a result.

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06-25-2012, 02:10 AM
  #44
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Originally Posted by brtriad View Post
In Lehman's terms? From what I've read, it's impossible for something to reach the speed of light, so when a vessel is pushed towards that, time slows as a result.
Time slows for astronauts in orbit vs. us although by only fractions of a second. 90% or so the speed of light is often used because it causes a larger discrepancy.

Traveling 20% the speed of light away from earth will still result in time travel, aka time dilation.

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06-25-2012, 02:15 AM
  #45
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I wonder why people say its not possible. some crazy guy will find how one day...

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06-25-2012, 02:16 AM
  #46
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To send a human body at the velocity required to obtain sufficient time travel would probably deteriorate the human body.

I wouldn't know though.. I haven't travelled through time.
It's just a Fresh Theory.

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06-25-2012, 02:20 AM
  #47
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Time travel will NEVER be possible.

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06-25-2012, 02:21 AM
  #48
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**** a few people here are damn smart.. talking about stuff way over my head..

Continue.

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06-25-2012, 02:22 AM
  #49
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Originally Posted by D Fresh View Post
To send a human body at the velocity required to obtain sufficient time travel would probably deteriorate the human body.

I wouldn't know though.. I haven't travelled through time.
It's just a Fresh Theory.
But...Han Solo did it but I do so think that in a couple hundred years someone will find some way

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Old
06-25-2012, 02:24 AM
  #50
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Originally Posted by ThatCrazyRangerFan View Post
I wonder why people say its not possible. some crazy guy will find how one day...
For it to be possible, several important laws of physics would have to be wrong. And we know those laws are not wrong.

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