More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
Forest fires move faster uphill than downhill.
52
The water of the Antarctica is so cold that nothing can rot there.
334
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
Even Antarctica has an area code. It's 672.
58