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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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28 agos 1776 año - Carl Wihelm Scheele (1742-1786) develops the first test for arsenic.
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marc and jaz
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marc pio
16 oct 2017
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28 agos 1776 año
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~ 249 years ago
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