Brian Greene, PhD, professor of physics and mathematics at Columbia University and bestselling author known for his groundbreaking discoveries in the field of superstring theory, spoke with Amir D. Aczel, mathematician and author whose books include New York Times Bestseller "Fermat's Last Theorem" and "Present at the Creation: The Story of CERN and the Large Hadron Collider," at the Museum of Science on March 2, 2011. In this insightful conversation, the two delve into the idea of parallel universes and the multiverse, the Bose–Einstein condensate, Cosmic Microwave Background Radiation, and even Greene's Erdős–Bacon number.