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A mosasaur tooth was discovered in the same displaced Hell Creek block as a T. rex tooth and a freshwater crocodilian jaw.

Classification and scale This animal was a mosasaur,a group of large marine reptiles that lived during the Late Cretaceous ...

Add Yahoo as a preferred source to see more of our stories on Google. This mosasaur skeleton is not what we thought. (Zietlow et al., Bull. Am. Mus. Nat. Hist., 2026) A prehistoric predator to rival ...

Add Yahoo as a preferred source to see more of our stories on Google. After remeasuring dozens of mosasaur specimens across multiple museums, paleontologists discovered a previously unknown species of ...

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 ...

Earth was a terrifying place during the Cretaceous period, some 66 million to 145 million years ago. During its tail end, Tyrannosaurus rex prowled the land. And a little before that, another kind of ...

Scientists have discovered a new species of mosasaur, large, carnivorous aquatic lizards that lived during the late Cretaceous. With "transitional" traits that place it between two well-known ...

Equipped with powerful jaws and finely serrated teeth, paleontologists say the 43-foot-long prehistoric marine reptile deserves the name Tylosaurus rex. After remeasuring dozens of mosasaur specimens ...