Even Antarctica has an area code. It's 672.
58
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Australia's Great Barrier Reef is 1,250 miles long!
45
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
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
There are approximately three chickens for every human on Earth.
13
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62