4 ms·
If another civilisation lived on Earth before us, would we know?
- chistev 3mo agoThe Silurian Hypothesis (2020) (theparisreview.org) 67 points 17 hours ago 112 comments https://news.ycombinator.com/item?id=49047563 https://news.ycombinator.com/item?id=49047563
- johncoltrane 3mo agoThere have been lots of civilisations before. Some that we know of and maybe some that we don't know of yet.