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The discovery of selenium, a trace metal and conductor of electricity, makes it possible to trap solar energy for future use, because its conductivity rises when exposed to direct sunlight. Exact date unknown.
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The light bulb was invented by Thomas Edison in the late 1870's. This event "brighten up" the science of energy, light, and electricity. Exact date unknown
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A Scottish inventor, James Blyth, created the first wind turbine which generates electricity in Marykirk, Scotland. the exact date is unknown
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Solar power was used for the first time commercially when it was used to power space exploration equipment such as satellites and space station.
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Prince Piero Ginori Conti tested the first geothermal power generator at the Larderello dry steam field in Italy
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The world's first commercial geothermal power plant was built in 1911, at the Larderello dry steam field, powering many areas.
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The Hoover Dam project is completed on the Salt River in Arizona. The hoover dam has 17 turbines that generate enough electricity to power 1.3 million homes.
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Francis Perrin introduced the concept of the critical mass of uranium required to produce a self-sustaining release of energy. Exact date unknown.
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The first ever atomic bomb was drop in Alamogordo, New Mexico.
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The first atomic power plant was built in Obninsk, Russia. This was used for commercial use.