They are all from a single species, Albertosaurus sarcophagus, a close relative of T. rex that is classified as a “tyrannosaur” family member. “It just struck me as being so crazy that ...

They also looked at relatives that roamed during the Late Cretaceous in Asia and other parts of North America, including Albertosaurus and Gorgosaurus. Skin patches from the neck, pelvis and tail ...