Ihmislajin aivot ovat kutistuneet viimeisen 5000 vuoden aikana kymmenisen prosenttia eli 150 kuutiosenttiä 1350 kuutiosentistä:
[list:9bcxyo6n]We know the brain has been evolving in human populations quite recently," said paleoanthropologist John Hawks at the University of Wisconsin at Madison.
[size=150:9bcxyo6n]Surprisingly, based on skull measurements, the human brain appears to have been shrinking over the last 5,000 or so years.[/size:9bcxyo6n]
we currently maybe have the least specific details with regard the brain, but we do know from archaeological data that pretty much everywhere we can measure - Europe, China, South Africa, Australia - that brains have shrunk about 150 cubic centimeters, off a mean of about 1,350. That's roughly 10 percent," Hawks said. "As to why is it shrinking, perhaps in big societies, as opposed to hunter-gatherer lifestyles, we can rely on other people for more things, can specialize our behavior to a greater extent, and maybe not need our brains as much," he added.
http://www.msnbc.msn.com/id/33916577/ns ... e-science/[/list:u:9bcxyo6n]
Veikkauksia syistä ?
Itse veikkaan vehnää ja jossain määrin muita viljoja - sehän tunnetusti sotkee mineraalien ja rasvaliukoisten vitamiinien imeytymistä/metabolismia ja mm. salpaa geenejä rotilla jopa kolmen sukupolven ajan.
Kaivelen juuri dataa aiheesta.
Pretending to be certain about propositions for which no evidence is even conceivable—is both an intellectual and a moral failing. —Sam Harris