National Geographic News, Reporting Your World Daily

Sunday, November 22, 2009

Photo: Did Climate Change Trigger Human Evolution?


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An early human child is depicted eating meat with his or her mother as others roam a grassy area in Africa.

Some scientists suggest that climate changes—including a prehistoric dry spell that may have spurred the growth of grasslands in a key African region—influenced the evolution of humans.

Illustration by Richard Schlecht