At the end of the Cretaceous Period, a type of giant reptile called mosasaurs occupied and dominated oceanic food webs. Mosasaurs had long bodies and were related to both snakes and monitor lizards.

Some 66 million years ago, a city bus-sized terrifying predator prowled a prehistoric river in what is now North Dakota. This finding is based on the analysis of a single mosasaur tooth conducted by ...

The Hell Creek Mosasaur, reconstruction by Christopher DiPiazza. Please note that more images and a short video are available at this link: https://springernature-my ...