If another civilisation lived on Earth before us, would we know?
1–3 of 3 posts
Re: If another civilisation lived on Earth before us, would we know?
#2The Silurian Hypothesis (2020) (theparisreview.org)
67 points 17 hours ago 112 comments
Re: If another civilisation lived on Earth before us, would we know?
#3There have been lots of civilisations before. Some that we know of and maybe some that we don't know of yet.