Theoretical Physicist. Professor, School of Earth and Space Exploration, Arizona State University. Chair of the Board, Bulletin of Atomic Scientists. Member of the Board, Federation of American Scientists. Director, Origins Project, exploring issues from the origin of universe to consciousness. Columnist. Author of several international bestselling books. Subject of a feature film documentary. Recipient of awards: Lilienfeld Prize, APS; Oersted Medal, AAPT; Gemant Award, AIP & NSF Public Welfare Medal, the only physicist to have been awarded all three prizes by major US physics organizations. Research interests: interface between elementary particle physics and cosmology.