Is time travel possible?

[Hack&Lube]

The only mathematical way that works is that you cannot travel back in time to your own universe. Any time travel will just go into a parallel universe and you can't go back to your specific quantum universe, thusly, paradoxes cannot happen and also. I like thinking that I live in a quantum universe, any state of my universe only exists as it as randomly observed. There must be another universe whereI have everything I have ever wanted.

[Five-hole]

John Titor is so awesome. Such a riveting narrative or whatever you want to call it. Modern genius.

[You Need a Thneed]

Time Travel is impossible. One big paradox would be created.

[Matata]

I've always thought that time travelling humans was one of the better justifications for UFO's. Any civilization advanced enough to time travel, would understand how dangerous that technology would be in the hands of self-destructive monkeys like us.

I've heard that it would be alot easier travelling back in time than moving forward. Imagine yourself in a big tree, climbing to the bottom of the tree is easy, but getting back to the exact branch you started at is much more difficult.

I think for our civilization lacks the knowledge to make any conclusive statements on time travel, its all just shots in the dark.

[maverickeastwood]

[FlamesAddiction]

IF travelling back in time is possible, then I think we'd be finding more time travellers in our mist right now. And if it is possible and they are not here, then it is a little concerning. Do we wipe ourselves out in the future before we discover time travel?

[Lanny_MacDonald]

I think its very possible and I believe that interstellar travel is possible as well. I think that we can achieve both by bending space through the use of electromagnetic fields. The technology has already been theorized and I think its only a matter of time before it becomes a reality.

[troutman]

http://www.spectacle.org/599/beckett.html


"The arrow of time" is the phrase frequently used by physicists to express the idea that time only seems to move in one direction. Hawking says there are three arrows of time: the thermodynamic (from less entropy to more), the psychological (humans remember past but not future) and the cosmological (the direction of time in which the universe is expanding, not contracting.) But "the psychological arrow is determined by the thermodynamic arrow"; these two must point in the same direction. The cosmological arrow is separate, and will in fact reverse itself; there will come a time when the universe is contracting. But then conditions will no longer be appropriate for the existence of intelligent life-forms which can ask questions about the arrow of time.

The reason life will not be able to exist when the cosmological arrow reverses is that "all the stars will have burned out and the protons and neutrons in them will probably have decayed into light particles and radiation. The universe would be in a state of almost complete disorder. There would be no strong thermodynamic arrow of time."

If time travel is possible, why haven't we met time travelers?

[Dion]

Originally Posted by Jiggy_12

Plausible, but its very hard to believe this ability wouldn't be abused or used immorally.

Exactly. Imagine the possibilities of going ahead in time and coming back with the winners of the World series, Stanley Cup and any other major sporting events. To then make major bets and become a millionaire

[Lanny_MacDonald]

Originally Posted by troutman

If time travel is possible, why haven't we met time travelers?

How would we know if they were?

I question whether people can't remember the future. Everyone has experienced deja vu, some people more than others. Maybe those are memories of your travels to the future? The mind is a wonderful structure, one we presently know very little about but are slowly expanding our understanding of its power. Maybe our minds have the ability to project into the future (or past). It would lend some credibility to the guy with the device he places around his head. Just tossing that out there for discussion.

[Matata]

Originally Posted by Dion

Exactly. Imagine the possibilities of going ahead in time and coming back with the winners of the World series, Stanley Cup and any other major sporting events. To then make major bets and become a millionaire

Someone's been watching 'back to the future II'.

There is a myriad of reasons why a Time traveller wouldn't reveal themselves, expecting them to do so is insane.

[Bring_Back_Shantz]

Originally Posted by Matata

I've always thought that time travelling humans was one of the better justifications for UFO's. Any civilization advanced enough to time travel, would understand how dangerous that technology would be in the hands of self-destructive monkeys like us.

That's a pretty bold statement.
The same could be said about the atomic bomb, or any number of other advanced technologies.

Just because a civilization is relatively far advanced, doesn't mean they've completely done away with people who would exploit that sort of technology.

[Dion]

Originally Posted by Matata

I've always thought that time travelling humans was one of the better justifications for UFO's. Any civilization advanced enough to time travel, would understand how dangerous that technology would be in the hands of self-destructive monkeys like us.

I've heard that it would be alot easier travelling back in time than moving forward. Imagine yourself in a big tree, climbing to the bottom of the tree is easy, but getting back to the exact branch you started at is much more difficult.

I think for our civilization lacks the knowledge to make any conclusive statements on time travel, its all just shots in the dark.

I find it odd that UFO's are often spotted near or over military bases.

http://www.geocities.com/Area51/Shad.../bases045.html

[troutman]

Rather remarkable advances in quantum gravity are reviving the theory; time travel has now become fair game for theoretical physicists writing in the pages of PHYSICAL REVIEW magazine.

http://www.pbs.org/wnet/hawking/myst...l/kaku1-1.html

Interestingly enough, Stephen Hawking once opposed the idea of time travel. He even claimed he had “empirical” evidence against it. If time travel existed, he said, then we would have been visited by tourists from the future. Yet we see no tourists from the future. Ergo: time travel is not possible.

Because of the enormous amount of work done by theoretical physicists within the last five years or so, Hawking has since changed his mind, and now believes that time travel is possible (although not necessarily practical). Furthermore, perhaps we are simply not very interesting to these tourists from the future. Anyone who can harness the power of a star would consider us to be very primitive. Imagine your friends coming across an ant hill. Would they bend down to the ants and give them trinkets, books, medicine, and power? Or would some of your friends have the strange urge to step on a few of them?

[troutman]

Originally Posted by Dion

I find it odd that UFO's are often spotted near or over military bases.

http://www.geocities.com/Area51/Shad.../bases045.html

Not odd at all, if the UFOs are secret military crafts.

[troutman]

Hawking lectures:

http://www.hawking.org.uk/lectures/lindex.html

The Beginning of Time
"In this lecture, I would like to discuss whether time itself has a beginning, and whether it will have an end. All the evidence seems to indicate, that the universe has not existed forever, but that it had a beginning, about 15 billion years ago. This is probably the most remarkable discovery of modern cosmology. Yet it is now taken for granted. We are not yet certain whether the universe will have an end."

The Nature of Space and Time
Stephen Hawking and Roger Penrose gave a series of 3 lectures each at the Isaac Newton Institute in Cambridge. The full series is available in a book of the same name. Here we have compiled Stephen's contribution to the series, as well as the final debate .

Space and Time Warps
"In science fiction, space and time warps are a commonplace. They are used for rapid journeys around the galaxy, or for travel through time. But today's science fiction, is often tomorrow's science fact. So what are the chances for space and time war ps."

[kermitology]

Originally Posted by Bring_Back_Shantz

That's a pretty bold statement.
The same could be said about the atomic bomb, or any number of other advanced technologies.

Just because a civilization is relatively far advanced, doesn't mean they've completely done away with people who would exploit that sort of technology.

But you could completely unfold the very fabric of time with a time machine in our ######ed hands..

That has universal impacts not just terrestrial.

[Dion]

Originally Posted by troutman

Not odd at all, if the UFOs are secret military crafts.

Yes, i've heard that theory being put out there.

Then there's those that suggest that crashed UFO's and their technologies are being used in some of the militarys latest top secret aircrafts.

[FlamesAddiction]

Originally Posted by Lanny_MacDonald

How would we know if they were?

I question whether people can't remember the future. Everyone has experienced deja vu, some people more than others. Maybe those are memories of your travels to the future? The mind is a wonderful structure, one we presently know very little about but are slowly expanding our understanding of its power. Maybe our minds have the ability to project into the future (or past). It would lend some credibility to the guy with the device he places around his head. Just tossing that out there for discussion.

Discover magazine had an article about the human brain a while ago, and they explained deja vu. It apparently happens when the brain takes information that should be stored in the area of the brain that is responsible for short-term memory, and stores it in the long-term memory area. It gives the sensation when some is presently ocurring, that it is a memory being retrieved.

[photon]

Time travel forward is much easier, and really that's the one I'm interested in.

See ya later suckers! *Poof*