Sharks have been on the planet longer than trees.
14
When it comes time to give birth, the female shark loses her appetite so she won't be tempted to eat her own pups.
280
Jellyfish as a species are actually older than dinosaurs and sharks.
383
Sharks, like other fish, have their reproductive organs in their chests.
248
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132