An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
Check your map! Virginia extends farther west than West Virginia.
67
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 warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Mexico City is built on top of an underground resevoir!
47
The state of Florida is bigger than England!
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