Harvard University professor and 2005 Nobel Physics Prize winner Roy Glauber smiles in his office at Harvard University in Cambridge, Massachusetts, October 4, 2005. Glauber won the prize for his contribution to the quantum theory of optical coherence. Glauber will share the prize with John Hall of the University of Colorado and National Institute of Standards and Technology, and Theodor Hansch of the Max-Planck-Institut fur Quantenoptik, Garching and Ludwig-Maximilians-Universitat in Munich, Germany. REUTERS/Brian Snyder Pictures of the Month October 2005