Mario R. Capecchi, Ph.D., professor of human genetics and biology at the University of Utah's Eccles Institute of Human Genetics and a Howard Hughes Medical Institute, is a co-recipient of this yearís Nobel Prize in medicine, awarded August 8, 2007. Smithies shares the award with American Mario R. Capecchi and Briton Martin J. Evans for developing a gene-targeting technique in mice. (UPI Photo/Dirk Douglass/University of Utah)