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In 1809, the first electric light was created.
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The first electric engine was created.
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In 1880, the battery was first created using copper and zinc.
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The Hoover Dam, a source of hydraulic energy, was opened to the public.
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Nuclear fission was discovered in 1937.
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Albert Einstein wrote President Roosevelt a letter warning him about the importance of research on nuclear energy.
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President FDR approves the creation of the atomic bomb.
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The US drops a uranium bomb on Hiroshima, Japan.
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President Truman signs the Atomic Energy Act of 1946.
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President Eisenhower signs the Atomic Energy Act of 1954.