University of Southern California Professor of Chemistry and Biochemistry Arieh Warshel, left, toasts with his wife Tami Warshel as he is honored after winning the 2013 Nobel Prize in chemistry at the USC campus in Los Angeles on Wednesday, Oct. 9, 2013. Arieh Warshel shares the 2013 Nobel Prize in chemistry with Michael Levitt and Martin Karplus for developing powerful computer models that others can use to understand complex chemical interactions and create new drugs.(AP Photo/Damian Dovarganes)
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