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.

A fossil once hailed as evidence of a unique mosasaur species, Xenodens calminechari, may be a forgery, a new study claims. The 72-million-year-old fossil, described in 2021, includes a partial ...

A giant ocean predator that terrorised the seas during the time of the dinosaurs may have also hunted in rivers, a tooth fossil discovered in North Dakota suggests. The extinct lizard-like reptile ...

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 ...

The fossil of Xenodens calminechari, once touted as a revolutionary discovery, is now under scrutiny. This 72-million-year-old mosasaur fossil once believed to be a new species, was recently ...

The remnants of a mosasaur show a sea predator that was ill equipped for slashing bites, and likely preferred to swallow its prey whole. Reading time 2 minutes Whoever said everything is bigger in ...

The ancient seas of the Late Cretaceous period would’ve been scary places to swim. Between 66 million and 100 million years ago, the world’s waterways were chock-full of real-life sea monsters. Not ...

Scientists have discovered a new species of mosasaur, a sea-dwelling lizard from the age of the dinosaurs, with strange, ridged teeth unlike those of any known reptile. Along with other recent finds ...

Scientists have discovered a new species of mosasaur, a giant sea-dwelling lizard that dates back to the age of the dinosaurs, that stands out because of its unique, star-shaped teeth. It’s thought ...