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April 17, 2011 / Omar J. Peters

Cities are Shrinking our Brains

Recent studies are indicating that the human brain has decreased in size by about 10%. The cause? Cities!

“As complex societies emerged, the brain became smaller because people did not have to be as smart to stay alive,” Geary told AFP. Geary and his colleagues used population density as a measure of social complexity, with the hypothesis that the more humans are living closer together, the greater the exchanges between group, the division of labor and the rich and varied interactions between people. They found that brain size decreased as population density increased.

Smaller brains don’t mean we are becoming less intelligent, however, only that we are more specialized, leaner. Via Discovery News

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