Today’s interesting fact has to do with the Sharks.

A sharks teeth are constantly replaced throughout life.

Shark teeth are dropped off and fall to the ocean floor.

Fossilised sharks teeth can be found in a large number of ancient sea beds.

Sharks do not have bones but instead the skeleton is made from cartilage.

A shark's jaw has at least one layer of tiny hexagonal plates, crystals of calsium salt, that provides additional strength.