Professor Stephen Oppenheimer, in one of his books, says that the oldest (undisputed) Mongoloid skeleton ever found is only 10,000 years old. It looks like a fairly recent body style.
The oldest modern human skeleton found in Japan is that of a Jomon, 13,000 years old. The Jomon are the ancestors of the Ainu who are of the Kennewick Man variety. I believe the Ainu types were here at least 25,000 years ago and Oppenheimer's DNA studies seem to support this early entry.
What is the oldest human skull in North America which could pass for a direct ancestor of Hiawatha?"
I've read 6,000 years...and, I will admit that I can't recall if it was 6,000 years ago or 6,000BC. Either way, they're late comers.
BTW, I'm glad to see them using the term 'paleoAmericans' instead of 'paleoIndians'.
Maybe we should go with Paleovespuccians, rather than Paleoamericans.