How Did Birds Lose Their Teeth And Get Their Beaks? Study Offers Clues.
Modern gulls, with their large eyes, long beaks and distinctly ancient-looking and bony faces, descended from animals such as the velociraptor and T. Rex. (Next time you get a hungry look from a seagull, remember that.) For more than a century, paleontologists have used fossils from all over the world to piece together how large, toothy, land-bound lizards evolved into flying, toothless, feathered animals.
https://www.scpr.org/news/2018/05/02/82706/how-did-birds-lose-their-teeth-and-get-their-beaks/
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