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Time travel could be possible, but only with parallel timelines

Time travel could be possible, but only with parallel timelines

HAVE you ever made a mistake that you wish you could undo? Correcting past mistakes is one of the reasons we find the concept of time travel so fascinating. As often portrayed in science fiction, with a time machine, nothing is permanent anymore — you can always go back and change it. But is time travel really possible in our universe, or is it just science fiction? Author BARAK SHOSHANY, Assistant Professor, Physics, Brock University Our modern understanding of time and causality comes from general relativity. Theoretical physicist Albert Einstein’s theory combines space and time into a single entity —…
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