Marie Skłodowska Curie ( ; ; 7 November 1867 -- 4 July 1934 ) was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity .
Marie Skłodowska -- Curie ( 7 November 1867 -- 4 July 1934 ) was a Polish and naturalized-French physicist , chemist and feminist who conducted pioneering research on radioactivity .