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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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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As of April 2010, Bill Gates had donated $36,854,000,000 in his lifetime! That's more than half of his total net worth!
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Billions of neutrinos pass unnoticed through your body every second.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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