If another civilisation lived on Earth before us, would we know?

2 comments

• chistev 10 hours ago

  The Silurian Hypothesis (2020) (theparisreview.org) 67 points 17 hours ago 112 comments

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

• johncoltrane 8 hours ago

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