The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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The Sahara desert expands at about 1km per month.
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Even Antarctica has an area code. It's 672.
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The state with the longest coastline in the Continental U.S. is Michigan.
31
Every year, Alaska has about 5,000 earthquakes.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
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There are more than 50,000 earthquakes throughout the world every year!
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