Photo: Sex-Based Roles Gave Modern Humans an Edge, Study Says

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An artist's rendering depicts a Neandertal settlement some 60,000 years ago. A new study suggests that modern humans' division of labor by sex and age gave them an edge of Neandertals, allowing the humans the ability to exploit a greater variety of food resources and live in larger communities.

Illustration by Randii Oliver, courtesy NASA/JPL

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