Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
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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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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The Statue of Liberty was a gift of friendship resulting from the diplomatic relationship between the United States and France.
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The Titanic was the first ship to use the SOS signal.
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