Sharks have the most powerful
jaws on the planet. Unlike most animals' jaws, both the sharks' upper and
lower jaws move.
A shark
bites with it's lower jaw first and then its upper. It tosses its head
back and forth to tear loose a piece of meat which it swallows whole.
Sharks never run out of teeth. If one is lost, another spins forward from the rows and rows of backup teeth.
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