Legendary Physicist Stephen Hawking Dead at 76 Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email British mathematician, astrophysicist (cosmologist) Stephen W. Hawking smiles during a news conference at the University of Potsdam, near Berlin, Germany, on Wednesday, July 21, 1999. ( Markus Schreiber / AP Images ) Produced by Ethan Oberman and Isabel Angell Hosted by Todd Zwillich Produced by PRI and WNYC