The Hell Creek Mosasaur, reconstruction by Christopher DiPiazza. Please note that more images and a short video are available at this link: https://springernature-my ...

Tyrannosaurus rex might be the most feared dinosaur to ever walk the Earth, but there was once another T. rex that terrorised the ancient seas. Named Tylosaurus rex, this fierce creature is a massive ...

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 ...

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.

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in ...