Fascinating, and it fits your suggestion that Clovis originated in the Southeast and moved back across the continent from there. I'd love to know if similar bone-based weaponry is attested further north or on the other side of the Strait although I guess finding something that is both associated with prey and above water is unlikely. In any case it's cool to see what modern technology can do for archaeology.
On a different note, I read the new Raff book last year. It didn't strike me as revelatory as far as archaeology and genetics were concerned.
Thanks Richard, I was born and raised here and lived here my whole life and never knew there were elephants here up until 14000 yrs ago. And Colombian Mastedons, the largest and last of the Mastedons, probably due to humans hunting them to extinction. If large mammals like elephants and Mastedons went back and forth between Russia and Alaska, there’s good reason to believe humans followed them, long before we lost all record of them.