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!
18
Forest fires move faster uphill than downhill.
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Check your map! Virginia extends farther west than West Virginia.
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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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 average ice berg weighs 20,000,000 tons!
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