Chicken will grow teeth when pigs can fly. Well, better start searching the skies for flying pork—scientists have discovered a mutant chicken with a full set of crocodile-like chompers. The mutant chick, called Talpid, also had severe limb defects and died before hatching. It was discovered 50 years ago, but no one had ever examined its mouth until now. The researchers recently created more Talpids by tweaking the genes of normal chickens to grow teeth. "What we discovered were teeth similar to those of crocodiles—not surprising as birds are the closest living relatives of the reptile," said Mark Ferguson of...