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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Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
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Super Nintendo and Sega Genesis had an online multiplayer mode.
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The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
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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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