Platycarpus ictericus, mosasaur skull Oviraptor and arranges them in a

and arranges them in a life-like position

sharp teeth

Millard County

Thus T-rex had a variety of sizes of teeth

The reason for this extinction is unknown

Platycarpus ictericus, mosasaur skull Oviraptor and arranges them in aMosasaurs were a group of predatory marine reptiles that were very successful during the Late Cretaceous Period. The first mosasaur fossils were found in the 1770's in a mine in the Netherlands, more than 50 years before the first dinosaur bones were found. Mosasaurs were among the first fossils recognized and scientifically described. "Mosasaur" means "reptile of the Meuse," a river near the quarry where mosasaurs were first found. Mosasaurs were