TD(1942- ) a British scientist who has developed important new ideas about relativity and black holes. He has continued working even though he suffers from a serious disease of the nervous system, and he uses a special computer system in order to talk. He wrote an extremely popular book called A Brief History of Time (1988), in which he explains his ideas about how the universe and time began and how they have developed.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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