You might know the Cretaceous Period for big animals such as ... mechanisms rather than just gulping down food like other reptiles. In the Late Cretaceous, hadrosaurs - the duck-billed dinosaurs - did ...

Discover what the prehistoric world was like and how it changed between when dinosaurs first appeared and the mass extinction at the end of the Cretaceous Period ... towards the end of the Triassic ...

The first Brachychampsa fossil was discovered in Montana's Hell Creek Formation—an ancient suite of rocks that was laid down near the end of the Cretaceous ... look much like their relatives did ...