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Sep 12, 1400
the dark ages
the dark age in europe was when all the world was devolping but it wasnt -
Sep 19, 1500
H. Cavendish
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A. de Ulloa
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F. Cronstedt
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W. Scheele
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D. Rutherford
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W. Scheele
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W. Scheele
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W. Scheele
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W. Scheele
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F.-J.M. von Reichenstein
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J. Black
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jabir bin hayyan
he try to change lead to gold