An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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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.
8
The average ice berg weighs 20,000,000 tons!
54
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
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
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The Amazon rainforest produces more than 20% the world's oxygen supply.
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