If another advanced civilization lived on Earth before us, would we know?
By breve · 2026-07-25 · 1 points · 0 comments
https://www.cnn.com/2026/07/25/climate/silurian-hypothesis-another-civilization-before-humans
By breve · 1 points · 0 comments · on Hacker News, read on BetterNews.
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