University of Southern California professor Arieh Warshel poses at his home after hearing he won the Nobel chemistry prize, in Los Angeles, California October 9, 2013. American-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: POLITICS SCIENCE TECHNOLOGY HEADSHOT)