> The generally accepted date for the arrival of
> people in the
> Americas is about 15,000 years ago, not long before
> the advent of
> agriculture in the Old World (about 12,000 years
> ago).

I understand that estimate has been raised to 25,000
by some researchers, perhaps even more. I'm not sure
if that's enough time to allow for adaptation. In any
case, it would seem to apply to unly those of Native
American descent.



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