Some think the Basque are an isolated remnant of Cro Magnon man in Europe.
When mention that to my half-sister, whoser father has Basque roots, she is never amused. :-)
I once saw a DNA 'break-down' for Kennewick Man, at the top of the list of genetic comnections was: 1. Ainu 2. Polynesian (I can't remember the others)
The 9,300 year old Kennewick Man skeleton was found in Washington state.
Jomon (pre-Ainu in Japan) type cord-pottery has been found in Olmec ruins in Mexico
I read the same about the early people found on the Canary Islands. Cro-Magnon had a larger brain than all humans today. (Did they have a higher IQ?)