Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

Many mammals have fur the color of brown and black. Why don't they have more exotic colors, like purple and neon pink?

DNA is revealing that many animals once thought to be a single species may actually be several hidden ones. But research on ...

Wadi al-Hitan, Egypt's Whale Valley, showcases evolution's transition of whales from land to sea. This UNESCO World Heritage site, 160 km southwest of Cairo, reveals hundreds of Archaeoceti fossils, ...

California treats most non-domesticated wildlife as restricted by default, which is just one reason why it has some of the ...

So, you've spotted some unfamiliar eggs in your garden. What next? Here are some tips for identifying common animal eggs and ...

A viral post shared on Reddit's r/gardening community highlighted a photo the gardener took of a little reptile cleverly ...

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 ...

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

Buford the Gila monster at Caldwell Zoo plays a surprising role in medical research, with the venom contributing to diabetes and weight loss medications.

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

Scientists have used a laser technique to analyze Charles Darwin’s original Galápagos specimens without opening their nearly ...