A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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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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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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Every year, Alaska has about 5,000 earthquakes.
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
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Australia's Great Barrier Reef is 1,250 miles long!
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