Mosasaurs, an extinct group of aquatic squamate reptiles, adapted to a very different environment during the Late Cretaceous period, as discovered by a group of scientists. These marine predators have ...

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.