Jennifer Raff

That's a really low bar for PPE.

Yeah, because I remember talking to Jennifer Raff about her lab and like, and reading her book Origins and like the Clorox spritzing and everything.

I'm just like, whoa, that's amazing.

So okay, so how do we get from ancient DNA to actual people?

The frigid peak when vast ice sheets locked up much of the planet's water between roughly 25,000 and 19,000 years ago.

Writing and Current Opinion in Genetics and Development, Bethany Potter of the Kansas Geological Survey, Savannah Hay of the University of Kansas and their colleagues Jennifer Raff and Amy Singh weighed three competing models against the genomic record.

A pre-LGM entry more than 25,000 years ago, a migration between 20,000 and 14,000 years ago, and a later arrival after 14,000 years, the old Clovis first position that dominated textbooks for decades.

The genetic evidence, they argue, fits the middle scenario.