There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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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
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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More than 25% of the world's forests are in Siberia.
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Europe is the only continent without a desert.
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The average ice berg weighs 20,000,000 tons!
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