Sean Carroll is a theoretical physicist at the California Institute of Technology. He received his Ph.D. in 1993 from Harvard University. His research focuses on fundamental physics and cosmology, especially issues of dark matter, dark energy, spacetime symmetries, and the origin of the universe. Recently, Carroll has worked on the foundations of quantum mechanics, the arrow of time, and the emergence of complexity. Carroll is the author of The Particle at the End of the Universe, From Eternity to Here: The Quest for the Ultimate Theory of Time, and Spacetime and Geometry: An Introduction to General Relativity. He has been awarded prizes and fellowships by the National Science Foundation, NASA, the Sloan Foundation, the Packard Foundation, the American Physical Society, the American Institute of Physics, and the Royal Society of London. Carroll has appeared on TV shows such as The Colbert Report, PBS's NOVA, and Through the Wormhole with Morgan Freeman, and frequently serves as a science consultant for film and television. He lives in Los Angeles with his wife, writer Jennifer Ouellette.