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 ...

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 ...

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 66-million-year-old tooth discovered in North Dakota, USA, suggests that some mosasaurs — extinct lizard-like reptiles that could grow up to 12 metres long — may have hunted in rivers as well as ...

Researchers are calling for CT scans to confirm the authenticity of a Cretaceous period fossil that led to the identification of a new mosasaur species. Reading time 3 minutes In 2021, scientists ...

A recent investigation demonstrates that mosasaurs, previously considered solely marine reptiles, managed to flourish in freshwater rivers during their last million years, just before extinction over ...