Lambeosaurus, 3/4 profile skull Spinosaurus This was in the Cretaceous

This was in the Cretaceous rocks of the Goby Desert of Mongolia

Younger sharks replace their teeth more often than older ones

smaller teeth being moved into the center of the whorl by the appearance of larger

is a medusiform Vendozoan possibly

Orthacanthus was the terror of freshwater swamps and bayous in Europe and North America

Lambeosaurus, 3/4 profile skull Spinosaurus This was in the CretaceousThis replica skull is from a juvenile Lambeosaurus. The large hollow bony crest had not yet developed on this young and small specimen. The skull is shown in a profile and is flat on the back. This specimen is made of hydrostone, which is an extra hard form of plaster. It has the weight of a real fossil. Lambeosaurus was a crested, duck billed dinosaur. Its forward leaning, hollow, bony crest was as big or bigger than the rest of its skull and may