Stable isotope analysis of mosasaur fossils from the Hell Creek Formation suggests some mosasaurs lived in freshwater environments. The findings challenge long-held assumptions that these giant ...

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 ...

Giant reptiles, masters of the oceans more than 66 million years ago, swimming in rivers? A recent discovery in North America raises this surprising hypothesis and changes our perception of mosasaurs.

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 ...