Mass extinction is not just a theory; Earth has already gone through five of them, including the event about 65 million years ...

Once, magnificent creatures like the Dodo and Passenger Pigeon roamed Earth. Their trusting nature and sheer numbers, however ...

How humanity nearly went extinct 70,000 years ago.

Human beings have been at the center of ecological change on Earth for thousands of years. But as history shows, no species ...

The end-Permian extinction 252 million years ago wiped out over 80 per cent of marine species, but many ecosystems still had ...

Smithsonian researcher Sarah Johnson studies bison specimens to understand how the species’s genetic diversity changed after ...

One of the most elusive mammals in the southern Sierra is primed to share secrets about its species. A rare “ghost fox” of the Sierra was recently captured by biologists. After evading capture for a ...

For some residents, it's a spectacle. For others, it's intimidation.

The lemuroid ringtail possum is one of 34 species that have just been added to Australia's threatened species list.

Insect taxonomist Art Borkent has described and named more than 300 species of midges but fears his field of science is dying out, despite millions of insects, fungi and other organisms waiting to be ...

Spotting a Manx Loaghtan on the mist-shrouded cliffs of the Isle of Man feels like observing a story from ancient mythology ...

Whether it's redfin pickerel in the Kennebec River or sturgeon in the Great Lakes, nearly one-third of freshwater fish ...