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 United States produces enough plastic film annually to cover the entire state of Texas.
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The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
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Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
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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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