Approximately 40% of the U.S. paper currency in circulation was counterfeit by the end of the Civil War.
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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 Canadian province of New Brunswick (which was part of the UK at the time) had a bloodless war with the US state of Maine in 1839
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Each king in a deck of playing cards represents a great king from history: spades - King David, clubs - Alexander the Great, hearts - Charlemagne, and diamonds - Julius Caesar.
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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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Queen Elizabeth II served as a mechanic and driver in World War 2.
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