I was reading facts on sharks and i came across a lot of cool facts bout sharks. Sharks have the most powerful jaw out of all the animals in the world! Sharks bit with their lower law first then bit with their upper jaw. Then the shark tosses its head back and forth untill a piece of meat come loose the it swallows the piece of meat whole. In a sharks lifetime they will grow and use 20,000 plus teeth. Sharks have been around for over 400 million years, they have been around evan longer than dinosaurs.