The observation of homosexual behaviors in animals has long raised questions about their origins and functions. A recent study, focused on primates, shows that these behaviors are not random but ...

Nonhuman primates like bonobos and chimpanzees might engage in same-sex sexual activities to strengthen bonds, particularly ...

Same-sex behavior is widespread in primates and may help strengthen social bonds and improve survival under challenging ...

A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...

Homosexual behavior in primates has a deep evolutionary basis and is more likely to occur in species that live in harsh ...

As animals go about their lives ― eating, fighting, having babies ― they don’t always follow the script laid out for them by ...

The human body evolved over eons, slowly calibrating to the African savanna on which 98 percent of humankind lived and died. So, too, did the human brain. Evolutionary psychology is the study of the ...

When I was an undergraduate biology major, I had the opportunity to pursue an independent study with Professor E.O. Wilson, reviewing some of the contemporary literature on sociobiology, a field he ...

While many studies have looked at possible evolutionary links between men's strength and sexual behavior, a Washington State University study included data on women with a surprising result. Women, as ...

Most pet behaviors are cute, but many of them may come from instincts developed by thousands of years of evolution. To learn more, put together a list of ways household pets have evolved as they’ve ...