The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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The Sahara desert expands at about 1km per month.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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