University of Southern California professor Arieh Warshel poses for photographers at USC after winning the Nobel chemistry prize in Los Angeles California October 9, 2013. U.S. and Israeli citizen Warshel won the Nobel chemistry prize with Martin Karplus, and Michael Levitt of the U.S. on Wednesday for pioneering work on computer programs that simulate complex chemical processes and have revolutionized research in areas from drugs to solar energy.
REUTERS/Lucy Nicholson (UNITED STATES - Tags: SCIENCE TECHNOLOGY)