A surprising fossil find shows that some mosasaurs lived in ancient rivers as oceans changed near the end of the Cretaceous.

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

This video explores how Mosasaurus evolved into a marine predator so dominant that it effectively “broke the game” of ...

One of the ocean's most formidable marine predators, the marine mosasaur Platecarpus, lived in the Cretaceous Period some 85 million years ago and was thought to have swum like an eel. That theory is ...

An enormous sea snake from Norse legend that was fathered by the trickster god Loki and grew big enough to circle the globe is now the namesake for a different type of “monster” — a newly discovered ...

Look into the jaws of a Mosasaurus and you will gaze into a nightmare. The seagoing lizard’s curved teeth stand in a line that point backwards to the throat, an extra set of piercing teeth on the roof ...

This mosasaur skeleton, belonged to Tylosaurus proriger, measures about 29 feet long and is on display at Sternberg Museum of Natural History in Kansas. Tylosaurs lived about 88 to 78 million years ...