Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
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Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
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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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The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
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Energy is being wasted if a toaster is left plugged in after use.
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The first alarm clock could only ring at 4 a.m.
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