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No going back: physicist’s proof claims time travel can only take us to the future

A physicist has distilled time travel into three lines of proof that shows if spacetime can be sliced into layers of light, every traveller must cross them in the same direction, so no journey can ever loop backwards.

We haven't written up this one. Euronews has the full story — the link below goes straight to it.

Read the original at euronews.com →

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