Evolution

A surprising diversity of dog shapes and sizes evolved long before the Victorians began making modern breeds

This finding is the first documented case of colonial behavior between two solitary species of spider

Controversial evidence hints that complex life might have emerged hundreds of millions of years earlier than previously thought—and possibly more than once

Wild chimps ingest the equivalent of multiple alcoholic beverages a day

Tiny fossils hint at when birds began making their mind-blowing journey to the Arctic to breed

Ant queens of one species are sexual parasites that clone ants of another species to create hybrid workers that do their bidding

Researchers have finally traced the origin of the spotted ratfish’s bizarre forehead teeth, which are used for mating

Our social voyeurism may have deep evolutionary roots

Traditional biology has long ignored nature’s sexual diversity—but evolution tells a far more complex story.

Other species exhibit capabilities that were once thought to be exclusive to Homo sapiens

China is having a fast-rising chikungunya outbreak in a place that has never had one before.

Ancient teeth found in Ethiopia belong to a never-before-seen species in the Australopithecus genus of human ancestors