April 9, 1999
Shared Paternity in South American Tribes Confounds Biologists and Anthropologists
The practice challenges assumptions about gender roles and the evolution of human sexuality
Recent studies of multiple fatherhood in indigenous societies in South America are forcing scientists to rethink their notions about the evolutionary roles of female fidelity and male provisioning.
Many biologists and anthropologists had assumed that those behaviors arose as a result of an evolutionary compact between men and women -- one
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