Cost of raising a medium-size dog to the age of eleven: $6,400.

The earth is about 6,588,000,000,000,000,000 tons in weight.

In Gulliver's Travels Jonathan Swift described the two moons of Mars, Phobos and Deimos, giving their exact size and speeds of rotation. He did this more than 100 years before either moon was discovered.

AMAZING FACTS