Marie Curie

Marie Skłodowska–Curie (7 November 1867 – 4 July 1934) was a physicist and chemist of Polish upbringing and, subsequently, French citizenship. She was a pioneer in the field of radioactivity, the only person honored with Nobel Prizes in two different sciences, and the first female professor at the University of Paris.
Her achievements include the creation of a theory of radioactivity (a term coined by her and Pierre), techniques for isolating radioactive isotopes, and the discovery of two new elements, radium and polonium. It was also under her personal direction that the world's first studies were conducted into the treatment of neoplasms ("cancers"), using radioactive isotopes.