There's a long-held belief that, in the animal world, males benefit from promiscuity and females benefit from monogamy. For centuries, zoologists have thought of males as bold and brave and females as ...

In water, in the air or on land—many animals display a range of same-sex behaviors. Scientists explain social bonds, pleasure ...

In a type of relationship known as mutualism, two different species benefit from one another through cooperation. While some animals live solitary lives, many rely on partnerships that improve their ...