Dr Percival McCormack: “I have found my life’s work in space medicine – fortuitously. To those who would seriously desire to enter this field, all I can say is: try, try and try again. And in the meantime, maximise your medical and scientific skills.”  Photograph: Paddy Whelan

Percy McCormack, who has died aged 85 in Illinois, USA, was a trailblazing visionary whose disciplines combined medicine and engineering. A man for t(...)