The Statue of Liberty was a gift of friendship resulting from the diplomatic relationship between the United States and France.
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There are 92 known cases of nuclear bombs lost at sea.
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No one knows how many people died during the sinking of the Titanic.
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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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In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
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Leonardo da Vinci was dyslexic, and he often wrote backwards.
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In 1518, a "dancing plague" struck Strasbourg, Alsace, whereby hundreds of people danced fervently in the streets over the period of a month. Some suffered heart attacks or strokes, and many others died from sheer exhaustion. It remains unexplained.
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