When closely related species mate, their offspring sometimes survive but cannot reproduce. This pattern often affects males ...

A plantation worker photographed this new genus of mammal in New Guinea, thought to have been dead for 6,000 years.

"This is exceptionally rapid detection of an outbreak." ...

Mammals are not especially diverse. Roughly 6,800 mammal species are known to exist, compared with about 8,800 species of amphibian, 11,000 species of bird and 12,500 of reptile. Yet when most people ...

As of 2026, more than 8,500 invasive species are established in the U.S., including plants, insects, reptiles, amphibians, ...

Baby dinosaurs weren’t coddled like lion cubs or elephant calves—they were more like prehistoric latchkey kids. New research ...

Scientists discovered some of the oldest bony fish fossils in China. The fossils explain the early history of animals with backbones.

"This is why the story of the invasive species appealed to me so much. This is something I can do. This is something I can ...

Invasive species are all over America, and it’s very likely you may have seen them in your own backyard. Some species are so ...

In the vast golden grasslands of sub-Saharan Africa, the secretary bird makes an unforgettable sight — long-legged, crested, ...

Scientists may have been dramatically undercounting the number of vertebrate species on Earth. A large analysis of more than 300 studies suggests that for every recognized species of fish, bird, ...

After a catastrophic outbreak of bird flu devastated southern elephant seal populations in 2023, scientists are on high alert.