Sean is a theoretical physicist specializing in quantum mechanics, gravity, and cosmology. He is a research professor at the California Institute of Technology Department of Physics. He has been a contributor to the physics blog Cosmic Variance, and has published in scientific journals such as Nature as well as other publications, including The New York Times, Sky & Telescope, and New Scientist. He has appeared on the History Channel's The Universe, Science Channel's Through the Wormhole with Morgan Freeman, Closer to Truth and Comedy Central's The Colbert Report. Carroll is the author of Spacetime And Geometry, a graduate-level textbook in general relativity, and has also recorded lectures for The Great Courses on cosmology, the physics of time, and the Higgs boson. He is also the author of four popular books. He began a podcast in 2018 called Mindscape, in which he interviews other experts and intellectuals on a variety of science-related topics.

Sean is an atheist and describes himself as a "poetic naturalist". While he does recognise that needlessly causing suffering to sentient beings is morally negative, he considers it acceptable to kill a sentient being without causing suffering if we think it lacks an ability to plan for or conceive of its own future. He uses this perspective to justify his continued use of animal products although remains open minded on the topic.
Sean on Wikipedia
preposterousuniverse.com
@seanmcarroll