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.

Today’s interesting fact has to do with the Beaver and it's teeth.

Beavers teeth are strong and grow continuously throughout its life.

Otherwise they would be worn down from all the chewing of wood.

Their incisors are orange, because they have large amounts of iron in their enamel, to make them harder and less likely to wear down.