An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
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Check your map! Virginia extends farther west than West Virginia.
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More than 25% of the world's forests are in Siberia.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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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.
14
Forest fires move faster uphill than downhill.
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Australia's Great Barrier Reef is 1,250 miles long!
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