U.S. scientist Roger Tsien, joint 2008 Nobel Prize winner in Chemistry, holds his glass as vice chancellor of health sciences David Brenner pops the cork of a bottle of champagne at the University of California San Diego following a press conference at the school in La Jolla, California October 8, 2008. Japanese researcher Osamu Shimomura and Americans Tsien and Martin Chalfie were jointly awarded the 2008 Nobel Prize for Chemistry on Wednesday. They won "for the discovery and development of the green fluorescent protein, GFP".
REUTERS/Mike Blake (UNITED STATES)