Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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The state with the longest coastline in the Continental U.S. is Michigan.
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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
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If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
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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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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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