In 1918, after the treaty of Versailles (end of WWI), the French Commander-in-chief said "This is not a peace. It is an Armistice for 20 years." 20 years and 65 days later, WWII happened.
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The first coast-to-coast telephone line was established in 1914.
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The flushing toilet was invented in 1596, not by Thomas Crapper as most people think, but by Sir John Harington.
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Until President Kennedy was killed, it wasn't a federal crime to assassinate the President.
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Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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Ancient Greeks believed that redheads turned into vampires after they died.
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