Fearsome dinosaur-era marine reptile was the T. rex of the sea

Tyrannosaurus rex was a huge land predator during the twilight of the age of dinosaurs. But it was not the only T. rex that terrorized the Cretaceous Period. ​There also was a marine reptile named Tylosaurus rex – the T. rex of the sea – that rivaled its land counterpart in size and ferocity.

Scientists ‌said they have identified Tylosaurus rex as a distinct species after a wide-ranging examination of previously discovered fossils. They made the judgment based on its enormous size, fine...