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PhysOrg

How did dinosaurs evolve beaks and become birds? Scientists think they have the answer

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Once you know that many dinosaurs had feathers, it seems much more obvious that they probably evolved into birds. But there's still a big question. How did a set of dinosaurian jaws with abundant teeth (think T. rex) turn into the toothless jaws of modern birds, covered by a beak? Two things had to happen in this transition, suppression of the teeth and growth of the beak. Now new fossil evidence has shown how it happened.

 

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