Wow that is a cool article! My speciality was lithic analysis and we all used to 'lust' after Clovis and Solutrean points, in the sense of getting to that level of flintknapping ability. I left the field around the time they started this research. Very interesting.
All those guys in that article are major league researchers.
You'll like this one too. Ever heard of mummies in Florida?
Bye Bye Beringia (7-8,000 Year Old Site In Florida)
Be sure to go to and click on post #51. 'European' DNA in the 90 preserved brains.