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Fistfights over women, resources and other physical forces evolved human facial structures, allowing our ancestors to more effectively defend direct punches to the face.  (LEALISA WESTERHOFF/AFP/Getty Images)

Study: Human Faces Evolved From Fistfights

Fistfights over women, resources and other physical forces evolved human facial structures, allowing our ancestors to more effectively defend direct punches to the face.

06/09/2014