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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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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The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
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Windmills always turn anti-clockwise. Except for the windmills in Ireland!
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First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
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UFO sightings have reduced by over 80% since the introduction of smartphones and public access to HD video.
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There's a Mumbai-based pizzeria that now delivers pizza by drone.
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