Tiktaalik, part fish, part four-legged animal, is believed to be the first creature to develop characteristics that would help animals move out of the water and on to land. It had gills ...

The 8-inch, bright pink slug has been isolated in a "sky island" for millions of years.

A remarkable plesiosaur fossil reveals that the extinct reptiles had scales like modern sea turtles, unlike the ichthyosaurs ...

It’s not just animal species at threat of extinction. It’s not just animal species at threat of extinction. With fewer than 250 mature individuals remaining, the rare Gratix's Paphiopedilum ...

A growing group of scientists is trying to bring back extinct animals, an idea that is drawing closer than ever because of recent advances in gene editing. Shapiro, one of the world’s leading ...

It may be this animal’s only chance to have its story told well, and forever. How about a memorable species you photographed that was endangered but seems to be bouncing back? What do you want ...