WASHINGTON — Scientists in Australia have identified the oldest known fossil footprints of a reptilelike animal, dated to around 350 million years ago. The discovery suggests that after the first ...

Mock vipers not only look like tree-dwelling vipers but also act like them. Intriguingly, they have a fake ‘fang’ in the front of their mouth, which befools a predator into thinking that they possess ...

In a study of fossils, a research team led by evolutionary biologist and Johns Hopkins Medicine assistant professor Matteo Fabbri suggests that a group of giant reptiles alive up to 220 million years ...

Scientists may have discovered the world's oldest butthole after unearthing the nearly 300 million year old backend of a reptile in Germany, per an upcoming study in the journal Current Biology.

Following careful study of a prehistoric skull of a new species unearthed in Madagascar, Azendohsaurus madagaskarensis, it turns out Azendohsaurus is not an early dinosaur as long assumed, but rather ...

Is it possible that feathers weren’t the first extravagant skin appendages in reptiles? The recent discovery of Mirasaura grauvogeli’s remarkable dorsal crest has upended long-held assumptions about ...

Viviparity, the live-bearing mode of reproduction, has evolved independently in several vertebrate lineages, including squamate reptiles and seahorses. In reptiles, evolutionary transitions from ...

This piece first appeared in the Front Matter section of the Proceedings of the National Academy of Sciences. A small but fierce jawbone sits in Argentina’s natural science museum in Buenos Aires. Six ...