The Silurian Hypothesis and Its Geological Evidence
PBS Space Time · Explainer · 20 min · 2023 · YouTube title: What if Humans Are NOT Earth's First Civilization? | Silurian Hypothesis
Why it's here
HN uses it as an approachable treatment of whether an earlier industrial civilization would be detectable in geology.
What it covers
PBS Space Time examines the Silurian hypothesis, the idea that an industrial civilization could have existed on Earth before humans. It looks at what traces such a civilization might leave in the geological record.