Add Yahoo as a preferred source to see more of our stories on Google. For over four decades, paleontologists have been arguing about a small dinosaur skull found in Montana. Several Tyrannosaurus rex ...

An argument over whether fossils from several small dinosaurs represent a juvenile Tyrannosaurus rex or smaller adults of a separate species may finally be settled. When you purchase through links on ...

For over four decades, paleontologists have been arguing about a small dinosaur skull found in Montana. Several Tyrannosaurus rex fossils have been found in the same Hell Creek rock formation, and ...