For nearly two centuries, a small brown frog living in Southeast Asian rainforests was considered a single, well-understood ...

A new study investigates an ongoing epidemic in Bay Area peregrine falcons.

You’ve probably seen a headline or two about an invasive species taking over. Perhaps you’ve seen a sign warning of ...

“Living fossil” is often misused, but chitons really haven’t changed much in about 300 million years.

Learn about the fatal encounters between two groups of killer whales, bringing the idea of whale cannibalism into question.

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, ...

Conservationist and ornithologist Steve Boyes has been searching for this elusive herd for years and the story of his journey ...

Scientists announced on March 5, 2026, that they have identified an entirely new genus of mammal called Tous, a group of ...

Earth’s vertebrate diversity may be far richer than anyone realized. A sweeping analysis of more than 300 studies suggests that for every known fish, bird, reptile, amphibian, or mammal species, there ...

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

Scientists are identifying more than 16,000 new species each year, and DNA tools could reveal billions more hiding.

Without interrupting their busy sleep schedule, Australia’s cute, if cantankerous, koalas have turned a truism of genetics on its head. In short, the proliferation of certain koala populations shows ...