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What if Humans Are Not Earth's First Civilization?

Season 9 Episode 32

About the Episode

We’re almost certainly the first technological civilization on Earth. But what if we’re not? We are. Although how sure are we, really? The Silurian hypothesis, which asks whether pre-human industrial civilizations might have existed.

Aired: 12/06/23 | Expires: | Runtime: 19m 19s
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