During a typical human life span, the human heart will beat approximately 2.5 billion times.

The United States has paved enough roads to circle the Earth over 150 times.

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.

A M A Z I N G   F A C T S