Sean Carroll is a research professor of theoretical physics 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. He 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 the textbook "Spacetime and Geometry: An Introduction to General Relativity", as well as several lecture courses for The Great Courses.