A shark always has a row of smaller teeth developing behind its front teeth. Eventually the smaller teeth move forward, like a conveyor belt, and the front teeth fall out.

Studies have shown that children laugh an average of 300 times/day and adults 17 times/day, making the average child more optimistic, curious, and creative than the adult.

Because of the unusual shape of their legs, kangaroos and emus struggle to walk backwards.

AMAZING FACTS