> The main mystery is why it started as late as it did, and not 100,000 years earlier.
Well, there were no humans in the americas 100,000 years ago, for a start.
Well, there were no humans in the americas 100,000 years ago, for a start.
We don't know there weren't people in the Americas then. We have good evidence somebody butchered a mastodon near what is now San Diego, what, 130kya? Might have been H. erectus, they really got around. Any way probably not H. sap.