An article published in the journal “Palaeontology” describes a research which concluded that mosasaurs were warm-blooded. These animals were marine reptiles that became extinct along with the dinosaurs about 66 million years ago, at the end of the Cretaceous period. Dr. Alberto Perez-Huerta, a professor of geology at the University of Alabama, and then students T. Lynn Harrell Jr. and Celina Suarez believe they have found evidence that mosasaurs were warm-blooded and not cold-blooded, like other scientists claimed.