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
Even Antarctica has an area code. It's 672.
58
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
Europe is the only continent without a desert.
62
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The water of the Antarctica is so cold that nothing can rot there.
334
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56