Paleontologists concluded that Tyrannosaurus rex and related carnivorous dinosaurs likely had lips covering their teeth, based on comparisons with modern birds and reptiles and studies of dinosaur anatomy.
Sources
- The 11 most astonishing scientific discoveries of 2023 (nationalgeographic.com)
- https://www.science.org/content/article/t-rex-lips-new-study-suggests (science.org)
- https://www.smithsonianmag.com/smart-news/t-rex-had-lips-that-concealed-its-teeth-study-says-180981914/ (smithsonianmag.com)
- https://www.snexplores.org/article/tyrannosaurus-rex-dinosaur-lips (snexplores.org)
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