During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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Pierre Jaquet-Droz, a watchmaker, 240 years ago invented a robot that could write, and the parts could be interchanged to say whatever you want.
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Early American humans hunted car-size armadillos and used their shells for houses.
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In 1537, England's King Henry VII officially declared February 14th the holiday of St. Valentine's Day.
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There are pictures of Knights fighting Snails in old Medieval manuscripts - and nobody knows why.
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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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In 1963, the US Military created an artificial ring around Earth, similar to that of the planet Saturn. The ring was made of copper needles and was used for worldwide communications in the case that the Soviets disabled all other methods of communication.
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