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

The researchers found that same-sex behavior was more common in primate groups with clear hierarchical structures and those ...

For most animals, losing fur would be a death sentence. Hair isn’t cosmetic in the wild, it’s survival gear. It protects ...

Scientists uncover the genetic “off switches” that made humans lose their fur.

Humans are the only primates that run nearly naked under the sun. Here’s how this biological tradeoff reshaped how our ...

The researchers found that same-sex behavior was more common in primate groups with clear hierarchical structures and those ...

In truth, it is not a paradox. The animals involved all seem perfectly eager participants in heterosexual behaviour, as well, so their reproduction is not compromised. It is, though, a puzzle—for ...

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

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

More than 59 different primate species have been observed participating in some kind of same-sex behaviors, making it ...

Biologists tend to look at the animal kingdom and try to categorize things in an organized fashion. But nature has a way of ...

Bonds between same-sex individuals help apes and monkeys to manage conflict and strengthen alliances, especially in dry ...