Dr. Brian Greene is the author of the new book "The Fabric Of The Cosmos" and one of the world’s leading physicists. He has been working on the unified theories and quantum gravity for more than a decade. In 1990, he and a colleague discovered mirror symmetry, launching a vibrant new field in physics and mathematics. Later, he and his colleague discovered topology change, showing that the fabric of space can tear, refuting Einstein’s theory that space can stretch, but not tear. His discoveries have been published in the leading science peer review journals as well as other science and popular press. Professor Greene has lecture in more than twenty-five countries and is widely regarded for a number of groundbreaking discoveries in superstring theory. Dr. Greene is the author of the bestselling book, “The Elegant Universe,” a book which became a finalist for the Pulitzer Prize and the subject of the recent three-part Nova PBS series hosted by Dr. Greene. Brian Greene received his undergraduate degree from Harvard University and his doctorate from Oxford University, where he was a Rhodes Scholar. He joined the physics faculty of Cornell University in 1990, was appointed to a full professorship in 1995, and in 1996 joined Columbia University where he is professor of physics and mathematics as well as co-director of the Institute for Strings, Cosmology, and Astroparticle Physics