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PBS Space Time
What If Humanity Is Among The First Spacefaring Civilization
Season 8
Episode 32
Half of the universe is filled with expansionist alien civilizations, and it’s only a matter of time before they’ll reach us. OK, that sounded a little sensationalist. But it’s also the conclusion of a recent astrophysics paper. Let’s see how they figure this, and whether we should take it seriously
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Is there evidence for the existence of an enormous number of other universes?
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Does this also explain why there are no aliens?
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