How Many Alien Civilizations Are There?
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YouTubeIsaac Arthur
How Many Alien Civilizations Are There?
Are we alone in the universe—or just early to the party? We’ll explore the math, models, and megastructures that might answer how many alien civilizations are out there, and why the night sky remains so quiet. Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as ...
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