In 1537, England's King Henry VII officially declared February 14th the holiday of St. Valentine's Day.
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Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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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 Titanic is about as long as the Empire State building is tall.
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Cleopatra married two of her brothers.
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Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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In the 1830s, a Greek prime minister tried to spread the potato in Greece but people weren't interested so he put armed guards in front of shipments of potatoes so people would think they were important. People then started stealing these potatoes so much that the crop spread to all of Greece.
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