Why the [expletive] can’t we travel back in time?

Ars Technica
By Ars StaffNov 30, 2021, 7:30 am185 pts
Enlarge (credit: David Silverman / Staff) Look, we’re not totally ignorant about time. We know that the dimension of time is woven together with the three dimensions of space, creating a four-dimensional fabric for the Universe. We know that the passage of time is relative; depending on your frame of…

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