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Politics : The Obama - Clinton Disaster -- Ignore unavailable to you. Want to Upgrade?

To: longnshort who wrote (38280)	9/23/2010 5:05:44 PM
From: DuckTapeSunroof	Read Replies (1) \| Respond to of 103300

Homo sapiens sapiens went through a "genetic bottleneck" (possibly as a result off rapid and adverse changes in climates) fairly recently (in EVOLUTIONARY TERMS) which nearly wiped out the entire species. Consequently, genetic variance between human populations is vanishingly small. Modern geneticists and evolutionary biologists calculate that all modern human populations probably descend from a surviving band that may have been as small as 12,000 or 13,000 individuals. (And obviously, and this is rather widely known, based on mitochondrial DNA which is inherited unchanged from female ancestors, we are all descendants of the same single female. Probably not because she was "Eve", but most likely because other lines of female mitochondrial DNA have since died out....) Re: "humans that had to struggle to survive using all their brain power in the ice age northern regions...." Not really much of a viable thesis that "cold" produces "intelligence".... (Wouldn't that have resulted in Neanderthals evolving into greater intelligence then us? After all, they probably had much longer for that to happen. Or, if "cold" is so important, why aren't polar bears very much smarter then tropical or temperate zone bears? Etc., etc. :-) PS --- recent evidence shows that Neanderthals were nearly exclusively carnivores of large game, too... (not omnivorous hunter-gathers such as homo sapiens sapiens were.)