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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In the early 1960's, Porsche commercially manufactured farm tractors.
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The first alarm clock could only ring at 4 a.m.
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Windmills always turn anti-clockwise. Except for the windmills in Ireland!
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An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
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Kleenex tissues were originally used as filters in gas masks.
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There's a Mumbai-based pizzeria that now delivers pizza by drone.
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