The electric chair was invented by a dentist!
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Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
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Sony researchers have developed a refrigerator that only opens when you smile.
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The cigarette lighter was invented before the match.
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To have your picture taken by the very first camera you would have had to sit still for 8 hours!
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The IRS processes more than 2 billion pieces of paper each year.
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