An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
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Australia's Great Barrier Reef is 1,250 miles long!
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Even Antarctica has an area code. It's 672.
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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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Europe is the only continent without a desert.
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