Harriet Brooks Pitcher, physicist and nuclear scientist (born 2 July 1876 in Exeter, ON; died 17 April 1933 in Montreal, QC). Harriet Brooks made important contributions to the field of atomic physics. She discovered that one element could change into another element through radioactive decay. Brooks was the first woman to receive a master’s degree from McGill (1901). She is considered the first Canadian female nuclear physicist. Ernest Rutherford referred to her as “the most pre-eminent woman physicist in the department of radioactivity,” next to Nobel Prize-winning physicist and chemist Marie Curie.