Video: Can wormholes act like time machines?
Thursday, April 30, 2020 - 08:30
in Physics & Chemistry
Time travel into the past is a tricky thing. We know of no single law of physics that absolutely forbids it, and yet we can't find a way to do it, and if we could do it, the possibility opens up all sorts of uncomfortable paradoxes (like what would happen if you killed your own grandfather).
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