Why haven’t we found evidence of alien civilizations? Neil deGrasse Tyson sits down with astrophysicist J. Richard Gott III to talk chess, tachyons, and what the Fermi Paradox and Copernican Principle say about humanity’s place in the cosmos. Plus, they rank super-genius movies. 

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https://startalkmedia.com/show/a-cosmic-conversation-with-j-richard-gott-iii/

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