Evolution

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

Science communicator Hank Green explains how our species’ unique intelligence got us into this climate mess—and how it will help us solve it

The Haenyeo, an all-female group of divers on South Korea’s Jeju Island, spend much of their lives underwater without equipment—a “superpower” that may be written into their DNA

Reducing the copies of one gene in the bubonic plague bacterium, Yersinia pestis, made it less deadly but potentially more transmissible