A newly identified fossil ape from northern Egypt is reshaping ideas about where the ancestors of modern apes first emerged.

Helping distressed wildlife without seeking advice may sometimes do more harm than good – as two experts explain.

In mammals, males are usually stronger and more competitive than females. Males also show greater inequality in reproductive success—the number of offspring they produce—than females. In spotted ...

When a male pearly razorfish is snatched from the sea, a female is forced to transition their sex too early. Scientists say ...

Research suggests that human monogamy reflects interactions among biology, culture, and environment rather than a fixed biologic trait, with pair bonding shaped by multiple influences.

Physical touch may be an important evolutionary tool to help manage social tension and keep the peace. That is according to a ...

If we’ve learned anything from Mowgli, it’s that growing up in the rainforest is brutally difficult. The same applies to orangutans, except their mothers can’t hire a bear and a panther to help.

Read a National Geographic magazine article about animal mating behaviors and get information, facts, and more about sexual ...