who moved to the Cavendish Laboratory, Cambridge, in 1951 to study the structure of DNA. In 1953 he and Francis Crick announced the now accepted two-stranded helical structure for the DNA molecule. In 1962 they shared the Nobel Prize for physiology or medicine with Maurice Wilkins (1916–2004), who with Rosalind Franklin (1920–58) had made X-ray diffraction studies of DNA.