Richard Darwin Keynes, CBE, FRS[1] (/ˈkeɪnz/ KAYNZ; 14 August 1919 – 12 June 2010) was a British physiologist.
The great-grandson of Charles Darwin, Keynes edited his great-grandfather's accounts and illustrations of Darwin's famous voyage aboard HMS Beagle into The Beagle Record: Selections From the Original Pictorial Records and Written Accounts of the Voyage of the H.M.S.
He was educated at Oundle School before going up to Trinity College, Cambridge.
During the war, Keynes served as a temporary experimental officer at the Anti-Submarine Establishment and Admiralty Signals Establishment (1940–45), returning to Cambridge after the war to complete his degree (1st Class, Natural Science Tripos Part II, 1946).
Outside Cambridge, Keynes's positions included: Secretary-General of the International Union for Pure and Applied Biophysics (1972–78), then Vice-President (1978–81) and President (1981–84); chairman of the International Cell Research Organisation (1981–83) and the ICSU/Unesco International Biosciences Networks (1982–93); President of the European Federation of Physiological Societies (1991); a Vice-President of the Royal Society (1965–68); Croonian Lecturer (1983); Fellow of Eton College (1963–78); foreign member of the Royal Danish Academy (1971), American Philosophical Society (1977), American Academy of Arts and Sciences (1978) and the American Physiological Society (1994).