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How Traveling Back In Time Could Really, Physically Be Possible
Is time travel possible? With a large enough wormhole, such as one created by a supermassive black hole connected to its negative mass/energy counterpart, it just might be.
Credit: Wikimedia Commons user Kjordand
It's one of the greatest tropes in movies, literature, and television shows: the idea that we could travel back in time to alter the past.
From Forbes
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