NASA / PAUL E. ALERS / SCIENCE PHOTO LIBRARY NASA / PAUL E. ALERS / SCIENCE PHOTO LIBRARY
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Stephen Hawking (1942-2018), British physicist, giving a lecture at the Morton Auditorium, George Washington University, Washington D.C., USA. Hawking is famous for his work on cosmology, quantum gravity and black holes. His 1988 book, 'A Brief History of Time', became a bestseller. He is confined to a wheelchair due to the condition amyotrophic lateral sclerosis. He was elected Fellow of the Royal Society in 1974, and was made a Companion of Honour in 1989. He was Lucasian Professor of Mathematics at Cambridge from 1979 to 2009. In 2007, he founded the Centre for Theoretical Cosmology at Cambridge where he is Director of Research. Photographed on 21 April 2008.
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