Every year, Alaska has about 5,000 earthquakes.
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One cubic mile of seawater contains about 50 pounds of gold.
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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 Amazon rainforest produces more than 20% the world's oxygen supply.
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The average ice berg weighs 20,000,000 tons!
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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