"No living reptile has cheeks. But no living reptile has grinding teeth anything remotely resembling those of a duckbill. If the duckbills could have evolved such unreptilian teeth, why couldn't they have evolved unreptilian teeth?"
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Original Language: English
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Sources
Robert T. Bakker The Dinosaur Heresies: A Revolutionary View of Dinosaurs (1986), Longman Scientific & Technical, p. 165
https://en.wikiquote.org/wiki/Hadrosaurs
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Hadrosaurs
'Hadrosaurs' or duck-billed dinosaurs, are members of the ornithischian family Hadrosauridae. The family, which includes ornithopods such as Edmontosaurus and Parasaurolophus, was a common herbivore in the Upper Cretaceous Period of what is now Asia, Europe and North America.
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