The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The water of the Antarctica is so cold that nothing can rot there.
334
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
Check your map! Virginia extends farther west than West Virginia.
67
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62