Harriet Brooks instance of human
Harriet Brooks (July 2, 1876 – April 17, 1933) was the first Canadian female nuclear physicist. She is most famous for her research  radioactivity. She discovered atomic recoil, and transmutation of elements in radioactive decay. Ernest Rutherford, who guided her graduate work, regarded her as comparable to Marie Curie in the calibre of her aptitude. She was among the first persons to discover radon and to try to determine its atomic mass.
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