The Mathematics and Physics Department and people across the world mourn the loss of Stephen Hawking, a British theoretical physicist famous for his work in cosmology and quantum mechanics.   After graduating from Oxford in 1962 and receiving his PhD from Cambridge in 1966, much of his research career focused on black holes and the discovery of Hawking radiation.  The author of many academic books and articles, Hawking also wrote a number of children's books and popular science books aimed at making science accessible to the general public.  Hawking was able to accomplish all this despite an early-onset of Lou Gehrig's disease.  Using of variety of speech-production devices that he helped to create, Hawking continued to lecture about his research and make public appearances in recent years despite his worsening physical condition.