Original: Marie SkÅ odowska Curie ( 7 November 1867 â '' 4 July 1934 ) was a Polish-born French physicist and chemist famous for her work on radioactivity .
Simplified: Marie SkÅ odowskaâ '' Curie ( 7 November 1867 â '' 4 July 1934 ) was a physicist and chemist .