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Uranium was discovered.
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Marie Curie's research had revealed that two uranium ores, pitchblende and chalcolite, were much more radioactive than pure uranium itself.
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Einstein created th equation e=mc2, which is the theory that tiny particles could be converted into energy, foreshadowing the development of atomic power.
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Neils Bohr was a physicist who came up with a theory on atomic structures and radiation emission. Also, he created the "Solar System" atomic model.
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Physicist Enrico Fermi discovered the potential of nuclear fission.
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Hahn and Strassman showed that fission not only released a lot of energy but it also released additional neutrons.
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The Manhattan Project was a secret military project to produce the first US nuclear weapon.
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"Little Boy" was dropped onto the town of Hiroshima.
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"Fat Man" was dropped onto the town of Nagasaki.
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Power plants started sprouting up in the 1950s to the 1960s
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The power plant started construction.
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The first power plant was made and completed.