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 loved animals so much that he used to buy caged animals at the market just to set them free.
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The U.S. motto, 'In God We Trust', was not adopted as the national slogan until 1956.
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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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The last time American Green cards were actually green was 1964.
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During the Gold Rush in 1849, some people paid as much as $100 for a glass of water!
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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Canada's new flag, with its maple leaf design, was unfurled in 1965 in Ottawa!
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