Pictures of the winners of the 2013 Nobel Prize in Chemistry are displayed on a screen during a press conference of the Royal Swedish Academy of Sciences in Stockholm, Sweden, on Oct. 9, 2013. Three scientists shared the 2013 Nobel Prize in Chemistry for the development of multi-scale models for complex chemical systems, the Royal Swedish Academy of Sciences said Wednesday. The prize was awarded to Martin Karplus (U.S. and Austrian citizen), Michael Levitt (U.S., British and Israeli citizen) and Arieh Warshel (U.S. and Israeli citizen). (Xinhua/Shi Tiansheng) |