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Time exists, but it is relative, not constant. We measure time compared to our accumulated experience: to a one-year-old, six months is half a lifetime; to a fifty-year-old it is one one-hundredth of a lifetime. By the time one is 100, years flash by like reflectors on the interstate. The actual year is the same length for the one-year-old and the 100-year-old, but it seems 100 times longer to the one-year-old. On the physical level, I think the Einsteinian relationship between time and the speed of light is misunderstood. I don't believe the speed of light is a barrier to travel, as early twentieth century wags believed the speed of sound was a barrier to travel. I also do not believe as many science-fiction writers apparently do that traveling faster than the speed of light will reverse the aging process. But as the recording of images or patterns conveyed by light or other radiation is the only means available for verifying an event (say, a bolt of lightning), being able to travel faster than the speed of light would in theory enable one to see the same event twice, once as it occurs and again at a distance ahead of the transmission of light. As there was in reality only one occurrence of the event, seeing it twice would imply a traveling back in time to re-witness it. But the time-reversal theory breaks down when one imagines attempting to witness the same event twice from the same location. If traveling faster than the speed of light really reverses time, then it should be possible to witness our original lightning strike, zoom an appropriate distance out and back faster than the speed of light and re-witness the same lightning strike from the same position. But no matter how fast we fly, we are using a discrete amount of time from our perspective to do so. We may witness the lightning strike again from some distance out on our way back to the original point, but when we get back the lightning strike will be gone no matter how fast we have travelled. Gotta go. Out of time.
"I love you to the height, and depth, and breadth my soul -- is that a cheeseburger?"
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