If time travel possible? If we can travel in future? If we can travel in past? Or Both actually?
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If traveling to the past is possible, then it already has happened, because the 4-dimensional spacetime is static. – safesphere Nov 19 '17 at 07:53
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Only into the future. Just wait a second and you are there. Not what you meant, I know. But that is all that is possible.
There are some iffy scenarios involving rotating black holes or worm holes. But nothing we can do.
mmesser314
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