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While I like to imagine all sorts of interesting scenarios about going back in time, I think we'll find out, or we already know, that time marches on, the arrow of time only points in one direction, the nature of the beast is that it only goes one way. So no matter what kind of worm hole or warp we ever accomplish, we will be able to go forward but never backwards. Even the mundane examples we have of time dilation due to higher relative velocity, such as astronauts when they were in space, or traveling near or at or over the speed of light, when you slow down and compare to a reference that was not doing that, you will have gone forward but you can't go back again. But for interesting stories sake, I like to fantasize about the impossible. At least this is what I think about time travel now.
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