The white-handed gibbon comes closest to humans in the study, with a monogamy rate of 63.5%. It’s the only other top-ranked ...

Humans are pretty monogamous, all things considered. That’s not a judgment call – it’s the conclusion of a new study from a researcher at the University of Cambridge’s Department of Archaeology, which ...

Young male blue tits are less successful in fathering offspring outside their breeding pair, not because of a lack of experience, but because they are outcompeted by older males, researchers report.

A female blue tit on her nest. Many females copulate not only with their own social partner, but also with one or more extra-pair sires. Under natural circumstances, these extra-pair males are ...

Get ready for Valentine’s Day by learning how zoo matchmakers use science to “swipe right” for conservation. Mike Bock Male Andean bear Quito (above) has fathered two cubs at the Smithsonian’s ...