The leathery Tyrannosaurus Rex of classic creativeness has given approach to the feathered horror of contemporary paleontological hypothesis. However science has another adjustment to make to our understanding of the traditional theropod: these huge enamel have been maybe coated by bizarre scaly lips too.

Analyses of dental histology from crocodylians and theropod dinosaurs, together with Tyrannosaurus rex, additional point out that the most probably situation was full protection of the marginal dentition with extraoral tissue when the mouth was closed. This modifications our perceptions concerning the look and oral configuration of those iconic predators and has broad implications for our interpretations of different terrestrial animals with massive enamel.