The great prehistoric shark certainly did both, equipped with frightening jaws adapted for the dirty work of cutting through skin, blubber, muscle, and bone. References: Kallal, R., Godfrey ...

The shark jaw was found Feb. 25 by Jay Wright, 25, of Dixon, Ky., a continuous miner operator for Webster County Coal. Wright told ABC News that he was filling in for a sick coworker that day ...

Because shark skeletons are made of soft cartilage, not hard bone, Daniels said finding anything ... provides a new model for the evolution of jaws according to Daniels. And he says they may ...