Evolution of mammalian monogamy remains mysterious

Two large studies reach opposing conclusions about why males stay with females

By Cristy Gelling, 16:00 PM August 9, 2013

Why some mammalian species choose to spend their lives with the same mates has long baffled scientists — and will probably continue to do so as two new massive studies present contradictory results.

One group of researchers says monogamy evolved in primates to counter the threat of males killing babies to boost their siring success. The other team concludes that mammals, including primates, become monogamous when females live far away from one another.

The differences in the studies have raised...

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