An international team of paleontologists has described a new species of mosasaur that lived in freshwater environments about 84 million years ago. According to scientists, the newly discovered species Pannoniasaurus inexpectatus is the first mosasaur to have lived in freshwater environments. This picture shows another species of mosasaur – Aigialosaurus bucchichi. The inset shows fossils of Pannoniasaurus inexpectatus found in Hungary, scale...
