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Dorothy Hodgkin (born May 12, 1910, Cairo, Egypt—died July 29, 1994, Shipston-on-Stour, Warwickshire, England) was an English chemist whose determination of the structure of penicillin and vitamin B12 brought her the 1964 Nobel Prize for Chemistry. Dorothy Crowfoot was the eldest of four sisters whose parents, John and Grace Mary Crowfoot, worked in North Africa and the Middle East in colonial administration and later as archaeologists. Sent to England for their education, the girls spent...