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.

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 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 ...

There’s a new T. rex in the fossil record, only this one terrorized the ancient seas. New research led by scientists at the American Museum of Natural History, the Perot Museum of Nature and Science ...

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Paleontologists have discovered a strange new species of marine lizard with dagger-like teeth that lived near the end of the age of dinosaurs. Their findings, published in Cretaceous Research, show a ...

A single dark tooth, nearly as long as your thumb, sat in a brown mudstone bed in North Dakota for 66 million years. When paleontologists finally pulled it from the Hell Creek Formation in 2022, they ...

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 ...

For decades, mosasaurs have been understood as among the dominant predators of the Cretaceous seas — marine reptiles that could reach 11 meters in length and patrol the waters of the Western Interior ...

Add Yahoo as a preferred source to see more of our stories on Google. A single tooth found among dinosaur bones in North Dakota reveals that some of the largest sea reptiles also ruled ancient rivers.