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The steam engine is invented.
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James Watt from Scotland designs a more efficient steam engine.
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People worried about elevator cars falling so Elisha Otis invented safety breaks.
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Is a safer way to blast holes in mountains or the ground than simply lighting black powder
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After 13 years of construction, the Brooklyn Bridge is finished in New York City.
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He believed that germs caused disease.
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Orville and Wilbur Wright invent the first plane that is not powered by wind.