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Sir Hermann Bondi: 1919 - 2005

The brilliant cosmologist and mathematician Sir Hermann Bondi has died at the age of 85. He was best known for developing the "steady-state" theory of the universe together with Thomas Gold and Fred Hoyle. Bondi also led a successful career as a science administrator, running the European Space Research Organisation for four years and spending six years as chief scientist to the UK Ministry of Defence. Bondi died on 10 September.