By Live Science, Seeker.com, June 3, 2016
The fierce dinosaur might not have had a “permanent smile” after all.
T. rex may have had lips. Yes, you read that right. Lips.
Robert Reisz, a paleontologist at the University of Toronto, is challenging the long-standing image of meat-eating theropod dinosaurs such as T. rex. Specifically, Reisz suggests that theropods’ teeth were not bared all the time, extending outside their mouths and fully visible whether their jaws were open or closed. Rather, these teeth were kept hidden, covered by scaly lips, he said in a presentation May 20 at the Canadian Society of Vertebrate Paleontology’s annual meeting in Ontario. [Gory Guts: Photos of a T. Rex Autopsy]
