Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
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The Taj Mahal took 20 years and 20 thousand men to finish!
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February 1865 is the only month in recorded history to not have a full moon.
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In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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In the 1930's, American track star Jesse Owens used to race against horses and dogs to earn a living.
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