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Martin Heinrich Klaproth found a grayish material and named it Uranium.
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It was introduced the electro magnetic field around atoms.
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They used the first atomic bomb.
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A small bomb.
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[Fatboy link](<a href='http://www.pbs.org/newshour/updates/military-jan-june05-bombs_05-02/)' >Fat Man link</a>It is a bigger modle of the littleman
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The tsar bomba is a very big bomb.
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In 1967 China tested its first hydrogen bomb.