The American Association for the Advancement of Science has elected nine faculty members at the University of Chicago as 2003 fellows. The nine are Ian Foster, Vinay Kumar, Joseph Lykken, Stephan Meyer, Viresh Rawal, Rick Stevens, Russell Tuttle, Bruce Winstein and Hisashi Yamamoto. Foster, Professor in Computer Science and the College and Associate Director of the Division of Mathematics and Computer Science at Argonne National Laboratory, was cited for basic contributions to the development of grid computing architectures and technologies. Kumar, Professor and Chairman of Pathology, was cited for pioneering studies on the delineation of the existence of a novel subset of lymphoid cells called natural killer cells. Lykken, Professor in Physics and scientist at Fermi National Accelerator Laboratory, was cited for imaginative and influential explorations of supersymmetry, string field theory and the physics of extra dimensions and for inspiring others through teaching and public lectures. Meyer, Professor in Astronomy & Astrophysics and the College, was cited for a significant role in the discovery and characterization of the anisotropy of the cosmic microwave background through two balloon-borne experiments and two orbiting satellites, including the Cosmic Background Explorer and the Wilkinson Microwave Anisotropy Probe. Rawal, Professor in Chemistry and the College, was cited for distinguished contributions to the practice of organic synthesis, including development of new methods and creative strategies for the efficient synthesis of complex natural products. Stevens, Professor in Computer Science and the Physical Sciences Collegiate Division and Director of the Division of Mathematics and Computer Science at Argonne, was cited for contributions to the advancement of high-performance computing and the development of collaborative scientific visualization environments. Tuttle, Professor in Anthropology and the College, was cited for pioneering work using electromyography in primate functional anatomical studies and for contributions to understanding human locomotor evolution. Winstein, the Samuel K. Allison Distinguished Service Professor in Physics and the College, was cited for fundamental contributions to the understanding of CP violation through a series of precision experiments using K mesons. Yamamoto, the Arthur Holly Compton Distinguished Service Professor in Chemistry and the College, was cited for fundamental studies on new methods for chemical synthesis through tailor-made Lewis acid catalysts. The Chicago AAAS fellows were among 348 members who were elevated to the rank this year because of their efforts to advance science or applications that are deemed scientifically or socially distinguished. New fellows will be recognized Saturday, Feb. 14, 2004, during the AAAS annual meeting in Seattle.