Evolution

Several factors, from geography to group identity, helped this traditional body art endure—even as similar practices were lost in other cultures

A fossil skeleton found in California leads to the discovery of a new mastodon species.

The monkeys lower the pitch of their "whinnies" when they're far from the rest of their group, which might help the calls travel further through jungle foliage. Christopher Intagliata reports.

Domestic felines distinguish between their monikers and similar-sounding words, new research shows

The raptorlike prints could also have been from juveniles of a larger species

Characteristic etchings on ancient prey bones reveal the animal that digested them

A new theory challenges assumptions about when and how our ancestors altered their behaviors to boost brainpower

Scientists tracked bumblebee queens with radar when they emerged from hibernation and found the bees take only brief flights en route to a new nest. Christopher Intagliata reports.

A huge T. rex was crowned as king of the tyrants. But the bones may tell a different tale

A fossil snout connects flying reptiles from the Iberian Peninsula and China

Contrary to a popular hypothesis, pro-social religions didn’t kick-start complex social systems

Whatever made these structures lived 1.4 billion years before the first animals