Notable alumni in the sciences include Nobel laureates Peter Higgs (Physics), Michael Houghton (Medicine), Michael Levitt (Chemistry), Max Theiler (Medicine) and Sir Frederick Hopkins (Medicine); polymath Sir Francis Galton; Raymond Gosling who took Photograph 51 which was critical evidence in identifying the structure of DNA; co-discoverer of Hepatitis C and of the Hepatitis D genome Qui-Lim Choo; pioneer of in-vitro fertilisation (IVF) Patrick Steptoe; mammal cloning pioneer Keith Campbell; pathologist Thomas Hodgkin; founder of modern hospice philosophy Dame Cicely Saunders; botanist David Bellamy; Shaw Prize laureate Sir Richard Doll; Kyoto Prize laureate Anthony Pawson; Wolf Prize laureates Michael Fisher (Physics) and Sir James Gowans (Medicine); Lasker Award winner John Hughes; Gairdner Foundation International Award winner R. John Ellis; Beriberi researcher Takaki Kanehiro; inventor of Kerosene Abraham Pineo Gesner; inventor of the Seismometer John Milne, and at least 111 Fellows of the Royal Society.