pbs-space-time 1 jaar geleden
Matt O'Dowd #Space and Time

What if Humans Are Not Earth's First Civilization?

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.

PBS Space Time
Matt O'Dowd
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