The blue whale's whistle is the loudest noise made by an animal.

A giraffe's tongue can sometimes be over a foot and half long.

Lions , one of the speediest land animals, spend about 20 hours a day resting.

A crocodile can't move its tongue and cannot chew. Its digestive juices are so strong hat it can digest a steel nail.

Experts say that crocodile is probably the closest living relative of  Tyrannosaurus Rex, which makes it nearly 19,50,00,000 years old .