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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Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
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The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
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There are only 14 blimps in the world.
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Attics were invented in Attica.
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