History ❯ Natural History ❯ Dinosaur Era

Cretaceous Period

Fossil Record Mass Extinction Events Tyrannosaurus rex Late Cretaceous Dinosaurs Edmontosaurus in Cretaceous Fossil Discoveries Predatory Dinosaurs Fossil Discovery Carnivorous Dinosaurs

Wyoming 'Mummy' Fossils Show Duck-Billed Dinosaur Had Hooves, Not Preserved Skin

Tests identify an ultra-thin clay layer that recorded the animals' outer form without retaining original organics.