Stephen Hawking, English theoretical physicist, 1990s.
© Science Museum / Science & Society Picture Library
Profesor Stephen William Hawking (1942-) with Kate Caryer at the opening of the 'Speak to me' exhibition, a temporary exhibition held at the Science Museum, London. Stephen Hawking is Lucasian Profesor of Mathematics at Cambridge University, and the author of the bestselling book on big bang theory and black holes, 'A Brief History of Time' (1988). He suffers from motor neuron disease.