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If another civilisation lived on Earth before us, would we know? (rnz.co.nz)
7 points by billybuckwheat 6 days ago
2 comments
chistev 6 days ago
The Silurian Hypothesis (2020) (theparisreview.org) 67 points 17 hours ago 112 comments

https://news.ycombinator.com/item?id=49047563

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johncoltrane 6 days ago
There have been lots of civilisations before. Some that we know of and maybe some that we don't know of yet.
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