For decades, paleontologists have believed that the very first dinosaurs evolved in the southern parts of the ancient ...

An illustration shows what Duonychus tsogtbaatari might have looked like. Unlike its therizinosaur brethren, the new species ...

It was one of the first dinosaurs discovered by scientists and, in 1824, became the first one to be given a name. The plant-eaters that left footprints were part of the group called sauropods ...