Rattlesnakes are venomous pit vipers native to the Americas, with 33 species identified by their distinct tail rattle. They ...

Pangolins, the world’s most trafficked mammals, frequently appear in wildlife seizures, yet there is no universal system for tracking or identifying individual animals. Researchers proposed what ...

Gorgonopsians weren't a direct ancestor of living mammals, nor did they give rise to the saber-toothed cats that existed until around 10,000 years ago. However, they were part of the wider ...

The gorgonopsian excavated in Mallorca laid eggs, unlike most mammals. But it was warm-blooded, unlike reptiles. Its leg shape and position were halfway between mammal and reptile. And its saber teeth ...

Despite not being particularly mammal-looking, the earliest true mammals began to rise about 200 million years ago, when dinosaurs were still roaming Earth. However, the therapsids still had ...

The origin of mammals is shrouded in mystery, but every fossil clue helps rewrite the story. A new discovery on a Mediterranean island is challenging what we know about when—and where—mammal ...

Snakes exhibit a fascinating diversity of reproductive strategies, including egg-laying (oviparity), live birth (viviparity), and a combination of both (ovoviviparity). They utilize pheromones for ...