and Longipteryx's tooth enamel is 50 microns thick. That's the same thickness of the enamel on enormous predatory dinosaurs like Allosaurus that weighed 4,000 pounds, but Longipteryx is the size ...

Allosaurus was the most common large carnivore of the Late Jurassic in North America. It was a smaller predecessor of the Cretaceous Tyrannosaurus. Strong forelimbs with sharp claws, powerful hind ...

Just how many teeth did a T-Rex have? How did Stegosaurus protect itself from Allosaurus? Why did Diplodocus swallow stones? Through hands-on experience with fossils and casts, students will discover ...