A pioneer in x-ray crystallography, Dorothy Hodgkin developed a 3D contour map of the structure of penicillin on sheets of perspex.
Years before computer-generated virtual imaging, she used three-dimensional techniques to reveal an invisible structure.
She was admired by her peers and students: 20 years after winning the Nobel Prize in 1964, a portrait of Dorothy Hodgkin was installed in 10 Downing Street by her former Oxford student, Margaret Thatcher.