Nicholas Posted June 23, 2009 Share Posted June 23, 2009 ScienceDaily (June 23, 2009) — For the past 2 million years, the size of the human brain has tripled, growing much faster than other mammals. Examining the reasons for human brain expansion, University of Missouri researchers studied three common hypotheses for brain growth: climate change, ecological demands and social competition. The team found that social competition is the major cause of increased cranial capacity. Find the article HERE! Link to comment Share on other sites More sharing options...
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