The surface area of your lungs is roughly the size of a tennis court.

A cockroach can live for several weeks without its head.

The longest living mammal is the bowhead whale, which can live up to 200 years.

The sound of a duck's quack doesn't produce an echo

The fingerprints of a koala are so indistinguishable from humans that they have been mistaken at crime scenes.

The human nose can detect over a trillion different scents.

The smallest mammal in the world is the bumblebee bat, which weighs less than a penny.

The mantis shrimp has the most complex eyes in the animal kingdom and can see colors that humans can't even imagine.

A cat has a jaw that cannot move sideways.