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#1
If time travel exists/will exist (), how come we have no historical record of someone coming from the future into the past?

Do they go to a different past than our past? Or are they seen as crazy people? Or is it invented so far in the future that our 10 thousand years or so is insignificant, and they just all went to the year 40,003...

And do you think they liked the movie Back to the Future?

tl;dr: *suspect drugs sleep deprivation.*
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Last edited by biga29 at Aug 12, 2010,
#3
I've thought of this a couple times, and I'm going to guess that in the future, when/if we invent time travel, there will be a set of rules, one of which will be not to interfere with anything in the past otherwise you get your time license revoked and you get launched into space.
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#4
Humanity obviously wipes itself out before we get the chance to make one.

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#5
........................,;:/|Simply~~Strings|\:;,......................
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#6
Quote by archangels
Answer one: You can only go back until the point the time machine was invented.

Can someone explain this one to me? I've heard before but never understood it.
all I ever wanted was to pick apart the day
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#8
We must've (can you use past tense when talking about the future...) moved planets, and time travel doesn't equal space travel, so we can only time travel on our new planet.

That must be it...


disclaimer: nothing in this thread should be taken seriously.
You can call me Aaron.


♠♣♥♦
Out on parole, any more instances of plum text and I get put back in...
#11
Quote by mattman93
Can someone explain this one to me? I've heard before but never understood it.


You can't use it before then because it doesn't exist.

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#12
I saw a video about this. You apparently go into a different dimension so if you killed your parents when they were 6 or something it wouldn't actually effect your life.
#13
Quote by valennic
You can't use it before then because it doesn't exist.

Would it not travel with you? And what if you were with someone who could make one with the resources available when ever you were going?
all I ever wanted was to pick apart the day
put the pieces back together my way
#14
The only way time travel is possible is to go forward, you can never go back. If you move faster than the speed of light, with a really good telescope, then you can witness the past from a distance, but never actually experience the past. Why? Because as many scientists have done before, if you plant several invitations in time capsules in many different countries telling time travelers to come to (location) at (specific time), and no one shows up, it proves you cannot go back in time. If they could, then eventually someone has to find a capsule in the distant future, someone with a time machine, and travel back in time to meet you. Which they didn't. I hope that made sense.

Anyway, you can only go forward by increasing your velocity so much that the particles in your body begin to age slower. Or some shit like that. Steven Hawking says so, so it's who I'm going with on this one.
#15
As of right now its physically impossible. The only "theoretical" way to go back in time is to go past the speed of light as seen in this equation.

T= time
V= Velocity
C=Speed of Light
Delta=Change
SR=Square Root
DeltaT= (Delta T)/SR(1-(V^2)/(C^2)

This is known as time dilation. The faster you move, the slower time moves relative to the speed of light and no matter how fast you go, you will never surpass the speed limit of the cosmos as time will infinitely move slower as you move closer to the speed of light. So you can only go 99.9999999% the speed of light. BUT if you were able to HYPOTHETICALLY the equation would go negative and you may go back in time.

There's also wormholes which can be separated by time instead of space but such phenomena would be fixed by the universe instantly after being created.

/nerd

Edit-You can't move faster then the speed of light - to poster above me. Telescopes are able to see things millions of years ago because things are millions of light years away so it takes millions of years for us to see it so we see thing from the past.
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Last edited by Thepredster at Aug 12, 2010,
#16
You can travel forward in time brah, just eat at McDonald's daily until you become as massive as the sun.

^ that's time dilation as experienced by two observers in inertial reference frames moving along a same axis only.
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Last edited by damian_91 at Aug 12, 2010,
#17
Quote by mattman93
Can someone explain this one to me? I've heard before but never understood it.
The theory holds that a 'receiving device' of sorts must be built for the time travelers to be able to arrive. Think of it like broadcasting a television signal: Even though you might be able to send the signal out, a television set is necessary to receive it.
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#19
Wouldn't there be a way to make all molecules (except those of your body) move backwards once you can predict their movements? This would allow time travel to the past.

Or I'm just hallucinating here

/semi-serious response
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#20
I just remembered something I was thinking of, to go faster than the speed of light we would need an infinite energy source but wouldn't an infinite energy source also have an infinite amount of mass. So something with infinite mass would probably **** with the whole gravity thing.


This post may or may not make any sense.
all I ever wanted was to pick apart the day
put the pieces back together my way
#21
Quote by damian_91
You can travel forward in time brah, just eat at McDonald's daily until you become as massive as the sun.

^ that's time dilation as experienced by two observers in inertial reference frames moving along a same axis only.


Yeah your right sortof. It still explains it pretty well I think. You can't move back as time only moves forward and you can go forward in time by slowing yourself.

But you probably know more about this than me.
Quote by Kyose
You sir are my God.

That game had the best synthesis system ever.


Quote by firebird103
I'm pretty sure you just won the thread. I can confirm everything you just said as well being a heavily qualified geek myself....

Congrats sir
#22
Quote by Thepredster
As of right now its physically impossible. The only "theoretical" way to go back in time is to go past the speed of light as seen in this equation.

T= time
V= Velocity
C=Speed of Light
Delta=Change
SR=Square Root
DeltaT= (Delta T)/SR(1-(V^2)/(C^2)

This is known as time dilation. The faster you move, the slower time moves relative to the speed of light and no matter how fast you go, you will never surpass the speed limit of the cosmos as time will infinitely move slower as you move closer to the speed of light. So you can only go 99.9999999% the speed of light. BUT if you were able to HYPOTHETICALLY the equation would go negative and you may go back in time.

There's also wormholes which can be separated by time instead of space but such phenomena would be fixed by the universe instantly after being created.

/nerd

Edit-You can't move faster then the speed of light - to poster above me. Telescopes are able to see things millions of years ago because things are millions of light years away so it takes millions of years for us to see it so we see thing from the past.


I never really got why people think you can't go faster than the speed of light... I also haven't looked into it at all, so I may sound stupid to those who have... But it just seems like another speed. I remember reading about how people along time ago used to think that if you went like 70 miles an hour your head would explode, and the same with the speed of time.

And what would happen if you were in a space ship going 1 mph under the speed of light, and you ran forward at 5 mph....?
You can call me Aaron.


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Out on parole, any more instances of plum text and I get put back in...
#23
Quote by mattman93
I just remembered something I was thinking of, to go faster than the speed of light we would need an infinite energy source but wouldn't an infinite energy source also have an infinite amount of mass. So something with infinite mass would probably **** with the whole gravity thing.


This post may or may not make any sense.
Well what if we have a craft that uses an insane amount of energy to get almost to the speed of light, and then you start running toward the front of the craft. You then break the lightspeed barrier. What happens then?


EDIT: ^ Basically what he said.
#24
As previously stated before, going back in time is impossible. For all of those who took earth science, the earth orbits at a certain speed and continuously rotates. Let's put it this way in non-scientific terms (hopefully someone can explain the reason to back up my statement), if you try to go back in time, you'll end up in a completely different spot. Hell, if you're unlucky enough, you'll just either get sucked into a black hole or float in space, resulting in pretty much instantaneous death. Now proving we can go into the future..I honestly have no idea.
#25
Quote by biga29

I never really got why people think you can't go faster than the speed of light... I also haven't looked into it at all, so I may sound stupid to those who have... But it just seems like another speed. I remember reading about how people along time ago used to think that if you went like 70 miles an hour your head would explode, and the same with the speed of time.

And what would happen if you were in a space ship going 1 mph under the speed of light, and you ran forward at 5 mph....?
You obviously haven't read anything about relativity or theoretical physics. There is a whole glorious internet filled with that information, so I'm not going to bother explaining it here. Just google 'theory of relativity' or something.
kill all humans
#26
Quote by biga29

I never really got why people think you can't go faster than the speed of light... I also haven't looked into it at all, so I may sound stupid to those who have... But it just seems like another speed. I remember reading about how people along time ago used to think that if you went like 70 miles an hour your head would explode, and the same with the speed of time.

And what would happen if you were in a space ship going 1 mph under the speed of light, and you ran forward at 5 mph....?


Because we have tried and it didn't work. We did it with particle accelerators that sped particles up ALMOST to the speed of light. It went up to 99.999% but couldn't break the speed limit. Also the particles "time" was significantly slowed down.
Quote by Kyose
You sir are my God.

That game had the best synthesis system ever.


Quote by firebird103
I'm pretty sure you just won the thread. I can confirm everything you just said as well being a heavily qualified geek myself....

Congrats sir
#27
Quote by biga29
And what would happen if you were in a space ship going 1 mph under the speed of light, and you ran forward at 5 mph....?

I doubt the human body could survive the g-force let alone run against it.
all I ever wanted was to pick apart the day
put the pieces back together my way
#28
How about we just make a machine to rearrange all the particles in the universe to their EXACT state at that point in time, except for what we want to stay the same. Then we wouldn't be able to time travel into the past, but rather recreate it! It's genius!*

Also I wonder if you recreate a situation to the exact point in time before a human makes a decision, is it possible for the human to make a different decision even though he is presented by the same environment, situation and options?

*Disclaimer: This idea is probably impossible.
Quote by mattman93
I doubt the human body could survive the g-force let alone run against it.
G-force is caused by acceleration, not uniform velocity. If the velocity is uniform at 299,999 km/s, then the acceleration is zero because it isn't speeding up or slowing down, making the net force zero. The ship might as well not be moving at all in terms of G-forces.

EDIT: My above idea is in fact impossible because if you think about it, If I'm still alive, and my machine is still on the go, thats means the matter in me and my contraptions is no longer in it's original position in space at that time, and because you cannot create matter as far as we know, then it creates an imperfect universe which could have a butterfly effect that ****s up thew whole future!

Goddamnit TS, I don't know why you made this thread, but this is wayyyyy too much thinking for 3:35am.
Last edited by Pat_s1t at Aug 12, 2010,
#29
Quote by Pat_s1t
Well what if we have a craft that uses an insane amount of energy to get almost to the speed of light, and then you start running toward the front of the craft. You then break the lightspeed barrier. What happens then?


EDIT: ^ Basically what he said.


Yeah you'd probably be dead but assuming your not. Time would run for you at about .01 or w.e so 1 second for you would be like an hr for us. Not accurate numbers but you get the picture.

Btw you guys should use google. It has a lot of info for this type of stuff
Quote by Kyose
You sir are my God.

That game had the best synthesis system ever.


Quote by firebird103
I'm pretty sure you just won the thread. I can confirm everything you just said as well being a heavily qualified geek myself....

Congrats sir
#30
Another stupid idea. Why don't we invent a ship that rides light?
You can call me Aaron.


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Out on parole, any more instances of plum text and I get put back in...
#31
Time travel has already been invented, people. We're traveling through time right now. The thing that Physicists and Quantum Mechanists are trying to do is figure our how to control time so we may travel freely in it. Right now, our technology isn't even close to being advanced enough to making the time travel that we're talking about possible.


I forgot to mention that the closest we'll be able to come to time travel in the near future is time travel to the past, even though it wouldn't be actual time travel to the past. Computers will recreate certain era's of life so that way you can "re-live" them, if that makes sense
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Last edited by darius606 at Aug 12, 2010,
#32
Quote by biga29
Another stupid idea. Why don't we invent a ship that rides light?


We don't even fully understand light I think. I'm still confused as hell if it should be classified as a photon or a wave. I hear its a disturbance in electromagnetism but I don't know.
Quote by Kyose
You sir are my God.

That game had the best synthesis system ever.


Quote by firebird103
I'm pretty sure you just won the thread. I can confirm everything you just said as well being a heavily qualified geek myself....

Congrats sir
#33
Quote by Thepredster
As of right now its physically impossible. The only "theoretical" way to go back in time is to go past the speed of light as seen in this equation.

T= time
V= Velocity
C=Speed of Light
Delta=Change
SR=Square Root
DeltaT= (Delta T)/SR(1-(V^2)/(C^2)

This is known as time dilation. The faster you move, the slower time moves relative to the speed of light and no matter how fast you go, you will never surpass the speed limit of the cosmos as time will infinitely move slower as you move closer to the speed of light. So you can only go 99.9999999% the speed of light. BUT if you were able to HYPOTHETICALLY the equation would go negative and you may go back in time.

There's also wormholes which can be separated by time instead of space but such phenomena would be fixed by the universe instantly after being created.

/nerd

Edit-You can't move faster then the speed of light - to poster above me. Telescopes are able to see things millions of years ago because things are millions of light years away so it takes millions of years for us to see it so we see thing from the past.


I'm pretty sure you just won the thread. I can confirm everything you just said as well being a heavily qualified geek myself....

Congrats sir
#34
Quote by Pat_s1t
How about we just make a machine to rearrange all the particles in the universe to their EXACT state at that point in time, except for what we want to stay the same. Then we wouldn't be able to time travel into the past, but rather recreate it! It's genius!*

Also I wonder if you recreate a situation to the exact point in time before a human makes a decision, is it possible for the human to make a different decision even though he is presented by the same environment, situation and options?

Disclaimer: This idea is probably impossible.

G-force is caused by acceleration, not uniform velocity. If the velocity is uniform at 299,999 km/s, then the acceleration is zero because it isn't speeding up or slowing down, making the net force zero. The ship might as well not be moving at all in terms of G-forces.

Hmm... it seems I've been out smarted. Although you'd probably have quite a bit a acceleration to get up to that speed.

Also this doesn't exactly match what you were asking but it seems sort of related. http://qntm.org/responsibility
all I ever wanted was to pick apart the day
put the pieces back together my way
#35
Quote by mattman93
Hmm... it seems I've been out smarted. Although you'd probably have quite a bit a acceleration to get up to that speed.

Also this doesn't exactly match what you were asking but it seems sort of related. http://qntm.org/responsibility


Not if you use my Light Ship.
You can call me Aaron.


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#36
Quote by Pat_s1t
The only way time travel is possible is to go forward, you can never go back. If you move faster than the speed of light, with a really good telescope, then you can witness the past from a distance, but never actually experience the past. Why? Because as many scientists have done before, if you plant several invitations in time capsules in many different countries telling time travelers to come to (location) at (specific time), and no one shows up, it proves you cannot go back in time. If they could, then eventually someone has to find a capsule in the distant future, someone with a time machine, and travel back in time to meet you. Which they didn't. I hope that made sense.

Anyway, you can only go forward by increasing your velocity so much that the particles in your body begin to age slower. Or some shit like that. Steven Hawking says so, so it's who I'm going with on this one.



The only problem with that is that nothing with mass can travel at the speed of light.
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#37
Quote by darius606
The only problem with that is that nothing with mass can travel at the speed of light.
Yeah, it was hypothetical. It would be cool to be able to travel to the distant universe before the light of earth reached it and watch the earth reform in super speed as you begin flying back towards Earth though, don't you think?

Man I'm making less and less sense with every post, perhaps I should go to bed soon...

Or perhaps I should watch more Dexter. Hmm...

Last edited by Pat_s1t at Aug 12, 2010,
#38
If you did travel backwards in time, what would designate WHERE you would land? Would it be the same exact spot where the capsule was? If so, then future humans would not land back on our planet because, by the time we invent time travel machines, we would have been long gone from Earth.
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#39
What would happen if there was a giant mirror 1 lightyear away from earth which shows the earths reflection (in fine detail). If you looked at the mirror with a telescope what would you see?
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#40
Quote by Serpentarius
What would happen if there was a giant mirror 1 lightyear away from earth which shows the earths reflection (in fine detail). If you looked at the mirror with a telescope what would you see?

The Earth 2 years ago.


And ****ing miracles.
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