Roger John Keynes FMedSci (/ˈkeɪnz/; born 25 February 1951) is a British medical scientist.
He is a Fellow of Trinity College, Cambridge, and a professor within the Department of Physiology, Development and Neuroscience.
His elder brother, Randal Keynes, was a conservationist and author, while his younger brother, Simon Keynes, is a historian and a Fellow of Trinity, as was their father, Richard.
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