Does Time Exist?
The Infinite Monkey Cage
00:00
Is Time Travel Into the Past Possible?
If the approach to quantum gravity that i work on, which is called causal set theory, is right, if it's along the right line, then that's impossible. I almost by fiat, but not quite. So yet my answer is no. And if by time travel you just mean that in space time, you can follow the future line and come back to yourself, i think i don't see reasons for this not being possible.
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