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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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14 mayo 1920 año - Carothers discovers polylactic acid while conducting research for DuPont.
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Emma Kushnerock
8 oct 2017
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fecha:
14 mayo 1920 año
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~ 105 years ago
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