The Fermi Paradox: There should be 100,000 intelligent alien civilizations in our galaxy — so why haven't we found any of them?

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Reminder that this essay -- Fermi Paradox -- is so entertaining and good and y'all should read it. tldr; there should be 100,000+ intelligent civilizations in the universe, and none of them have made contact. Wtf? The theories are 🤯