wait you mean that in terms of known genetic mechanisms there were significant and unexplainable leaps in the genetic evolution of mankind sometime in the last 4000-8000 years.... maybe the History channel is onto something, or maybe they are trying to discredit the concept by drowning it in ludicrous extrapolations and personalities.
BFD. The Ainu were blonde haired and blue eyed until they began being raped by the Yamato race starting around 800BC.