But do smaller brains mean we are getting dumber, or less aggressive?
(NEWSER) - Today's human brain is 10% smaller than that of our Cro-Magnon ancestors, but scientists are divided on whether that means we are getting smarter or dumber. Some say it does represent a dumbing down, but that our increasingly complex society means individuals don't need as much intelligence to survive and reproduce. Others think it's a sign of domestication and lower aggression, pointing to cases of shrinking brain mass among some species as they become less violent, reports NPR . "Another way to say that is an increase in tolerance," said a Duke anthropologist. More»
