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What physics really says about time travel possibilities

Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that ...
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Is time travel even possible? An astrophysicist explains the science behind the science fiction

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Will it ever be possible for time travel to ...