Nobel Laureate Physicist. He received professional recognition, along with Val Logsdon Fitch, after being awarded the 1980 Nobel Prize in Physics for their 1964 experiment that proved that certain subatomic reactions do not adhere to fundamental symmetry principles, which led to the discovery of CP violation. He earned his BSc degree from Southern Methodist University in 1951 before attending the University of Chicago, where he earned his Ph.D. in physics in 1955. While at the University of Chicago, he benefited from being taught by stalwarts of the field, including Nobel Prize recipients Enrico Fermi in 1938, Maria Mayer in 1963 and Subrahmanyan Chandrasekhar in 1983. He worked as an assistant physicist at the Brookhaven National Laboratory (BNL) from 1955 to 1958 when he joined the faculty at Princeton University at the encouragement of Fitch, a colleague from Brookhaven Nation Laboratory. Together they studied the decays of neutral K mesons and in 1964 they made their important discovery, which later earned the duo the Nobel Prize. After the discovery, he spent a year in France at the Centre d'Etudes Nucleaires at Saclay. After returning to Princeton, he continued studying the neutral CP violating decay modes of the long-lived neutral K meson. He remained at Princeton until 1971 when he returned to the University of Chicago to become a professor of physics. He was also instrumental, along with fellow physicist Alan Watson, in developing the Pierre Auger Project, an observatory in Argentina, which studies the highest-energy particles in the Universe, which hit the Earth from all directions, so-called cosmic rays. Later he was Professor Emeritus at the University of Chicago and a spokesperson emeritus for the Auger project. Besides the Nobel Prizes, his other awards were the Ernest Orlando Lawrence Award in 1976 and the National Medal of Science in 1999.