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Alphadino65
MemberTriceratopsJun-24-2017 11:44 AMA recent theory that has abounded in paleontological communities since last year (mostly inspired by the research that went to into portraying T.rex in a new video game called Saurian) was that tyrannosaurs had lips that fully encased their teeth when they closed their mouths. The explanation was that their enamel-covered teeth needed to be coated in fluid constantly to prevent them from degrading.
However, some well preserved skull fossils from a new species of Daspletosaurus may have disproved the lip theory:
