Mexico City is built on top of an underground resevoir!
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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The Sahara desert expands at about 1km per month.
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One cubic mile of seawater contains about 50 pounds of gold.
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A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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