Re: What is with all of this "My little pony" stuff? (The unofficial official MLP Thr
You're forgetting something important. We already know that, for a traverler traveling near the speed of light, it's all a matter of who's watching, and from where. To those observing the ship from earth, time aboard the ship appears to slow down. But to those aboard the ship, time outside appears to speed up.
So, to someone in the present, it's the future that's uncertain, the past that is writ in stone. But to one who travels into the past, while that past becomes their present, from their viewpoint, the past becomes uncertain, since they now have the power to change it, but the future, having already occured to them, appears writ in stone. I'd say it's the present that always remains fluid, a person's movement along the timeline simply changing their view of past and future. In this way, I'd say all of time is fluid... if timetravel (into the past) became possible and practical.
Though the most interesting theory of time I've heard described time as fixed, both past and future, each "moment" like a still photo, our "movement" through time simply a perceptual illusion. Which would mean all of time is fixed, rather than fluid. Which would also mean, if we could alter our perceptions, we could travel through time, if only back and forth along our own perceptual timeline, just as we can open a photo album and view any "picture" (or series of pictures) in it.
Heh... then there was this concept: http://www.youtube.com/watch?v=h2rz7bMeDTA ... http://www.youtube.com/watch?v=ssbUPxWnGmk&feature=related
From what I know about our current understanding of physics the past is uncertain and the future is set in stone.
You're forgetting something important. We already know that, for a traverler traveling near the speed of light, it's all a matter of who's watching, and from where. To those observing the ship from earth, time aboard the ship appears to slow down. But to those aboard the ship, time outside appears to speed up.
So, to someone in the present, it's the future that's uncertain, the past that is writ in stone. But to one who travels into the past, while that past becomes their present, from their viewpoint, the past becomes uncertain, since they now have the power to change it, but the future, having already occured to them, appears writ in stone. I'd say it's the present that always remains fluid, a person's movement along the timeline simply changing their view of past and future. In this way, I'd say all of time is fluid... if timetravel (into the past) became possible and practical.
Though the most interesting theory of time I've heard described time as fixed, both past and future, each "moment" like a still photo, our "movement" through time simply a perceptual illusion. Which would mean all of time is fixed, rather than fluid. Which would also mean, if we could alter our perceptions, we could travel through time, if only back and forth along our own perceptual timeline, just as we can open a photo album and view any "picture" (or series of pictures) in it.
Heh... then there was this concept: http://www.youtube.com/watch?v=h2rz7bMeDTA ... http://www.youtube.com/watch?v=ssbUPxWnGmk&feature=related
