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31:14
YouTube
Isaac Arthur
Cyclic Apocalypses
A look at the possibility of future civilizations rising and falling, if it is preventable, and if it may have happened in Earth's own deep past. Visit our sponsor: https://skl.sh/isaac Join this channel to get access to perks: https://www.youtube.com/channel/UCZFipeZtQM5CKUjx6grh54g/join Visit our Website: http://www.isaacarthur.net Join ...
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