The U.S. Department of Agriculture said an animal research facility illegally shipped primates without proper health ...

Monkey experiments hint at a "motivation brake" pathway between two brain regions. Manipulating it may lead to new treatments ...

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 ...

In humans, personality similarity between partners can lead to better compatibility and well-being. Is the same true 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 ...