Wormholes and Time Travel? I believe that wormholes do exist, but what intrigues me the most is the idea that if you excite one end of a wormhole, but not the other, that you could theoretically move forwards or backwards in time. What are your thoughts on this?

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It is an interesting concept, time travel.  I don't see why it would not work, in theory.  The limiting factor has, and always will be the speed of light.  It is the fastest known speed we have in this present time.  If we could find a way to surpass it, we possibly could manipulate time.

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The concept of time travel in physics seems a bit different, to me, than time-travel in sci-fi.

The time-space situation of an object in a worm-hole is what gets altered, in a huge way, according to the worm-hole time-travel theory. But that doesn't mean travel backwards in time is possible. At least that's my picture of it, but I am far from an expert.

The worm-hole time travel idea seems like an exaggerated version of the example given in beginner physics courses: an astronaut leaves earth, travels at speeds near the speed of light, then returns to earth having aged much less in his travel time than the people earth have aged.

Time, in this case, is shown to be relative and time-travel is shown to be theoretically possible. But it's not like the astronaut can go back and kiss his mother when she was a baby in the crib. In concrete terms, that is still impossible.

In a purely physical way, there is no past to travel back to. It doesn't exist anymore. Neither does the future. Only the present exists, physically.

 

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The idea of going back in time makes my head hurt (would I somehow be back in time but also in the present present?).  It certainly would be fascinating to go back in time, as long as one went there as a tourist rather than as a permanent resident.

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Wormholes are certainly fascinating objects. While I do believe they exist, I'm not sure what their possibilities are. One day, I'm sure science will be able to prove their existance. For now, most studies seem focused on finding wormholes rather than studying what they might do. We simply do not know where a wormhole might lead or what its properties will be. There are several theories about wormholes. One is that it could lead to time travel, but only to the past not the future. It is also theorized that these wormholes could lead to other places or even parallel universes.
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As I understand it, wormholes would only enable time travel in reverse, not forward- nothing can do that, even theoretically. In any case, it would be very difficult to harness their ability to do that. Other equally plausible quantum mechanics theories have suggested that one can travel to parallel universes through wormholes.

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This whole idea is very creepy to me. I don't like where my mind goes when I try to wrap it around time travel. I find it hard to see how time travel would be possible, wormhole or not, given our current understanding of time and how it works.
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This seems unlikely to ever actually be practical (or at least in the foreseable future).  If nothing else, it seems like you would need tremendous amounts of energy to actually do such a thing.  The theory is very interesting and good for use in TV shows, but it seems certain that no one alive today will live to see us get anywhere close to doing this.

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