Brian is a theoretical physicist, mathematician and string theorist. He is a professor at Columbia University and has been chairman of the World Science Festival since co-founding it in 2008. Brian has become known to a wider audience through his books for the general public, The Elegant Universe, Icarus at the Edge of Time, The Fabric of the Cosmos, The Hidden Reality, and related PBS television specials. He also appeared on The Big Bang Theory episode "The Herb Garden Germination", as well as the films Frequency and The Last Mimzy. He is currently a member of the Board of Sponsors of the Bulletin of the Atomic Scientists.
Brian is an atheist and has a naturalistic worldivew. He is vegan, implying he has a sentiocentric moral scope.