The Bruce and Astrid McWilliams Center for Cosmology at Carnegie Mellon University joins research efforts in astrophysics and particle physics and partners with computer science, statistics, and other disciplines to unravel the mysteries of the universe. More than 95 percent of the universe is composed of mysterious dark matter and dark energy, about which little is known. Dark matter is thought to play a key role in the formation of galaxies and the clustering of galaxies in the universe. Dark energy is responsible for the accelerating expansion of the universe. The center supports research on the makeup of the universe and how it evolved to its current state, and assists faculty and students engaged in a multidisciplinary quest to advance understanding of the universe.