With its massive sail, elongated skull, and adaptations for a semi-aquatic lifestyle, it has challenged long-held ideas about dinosaur evolution. In this video, we explore the discoveries that ...

While Duonychus tsogtbaatari had formidable claws, they were likely used to grasp vegetation, according to a study of a fully ...

One member of this group was a large, sail-backed animal called dimetrodon, which looks like it could be a dinosaur but isn’t. Then 252 million years ago came the Permian-Triassic extinction event.