Paleontologists have long hailed Tyrannosaurus rex as king of the dinosaurs. Now, the name "T. rex" also belongs to a newly ...

A new species of mosasaur — one of the largest marine reptiles ever documented ...

A colossal new sea predator named Tylosaurus rex has been identified from fossils found in Texas, revealing a brutal 43-foot-long hunter that ruled ancient oceans 80 million years ago. The discovery ...