How Much Did Grandmas Influence Human Evolution?

How Much Did Grandmas Influence Human Evolution?
(AP Photo/Fernando Vergara)

The seeds of an idea were planted as Kristen Hawkes watched older women collecting vegetables.

Hawkes, a professor of anthropology at the University of Utah, has extensively studied the Hadza, a group of hunter-gatherers in Tanzania who eat a lot of wild foods such as berries and tubers.

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