The wolf is the ancestor of all breeds of domestic dog. It is part of a group of animals called the wild dogs which also includes the dingo and the coyote.

A brown dwarf is a very small, dark object, with a mass less than 1/10 that of the Sun. They are 'failed stars', globules of gas that have shrunk under gravity, but failed to ignite and shine as stars.

Borborygmi is the noise that your stomach makes when you are hungry.

AMAZING FACTS