American theoretical physicist and string theorist most widely known for his publication The Elegant World. He guest-starred as himself in the movies Frequency as well as the Last Mimzy. He researched physics and traditional piano at Oxford College or university, graduating like a Rhodes Scholar in 1987. His second publication, The Fabric from the Cosmos, was converted to a PBS tv special from the same name. He wedded producer Tracy Day time. He produced a visitor appearance within the Big Bang Theory, a favorite sitcom starring Jim Parsons .