Marie Curie discovered the elements radium and polonium. The first is polonium: Marie Curie and her husband, Pierre Curie, found it while searching for the root of the radioactivity in uranium-rich ore called pitchblende. Marie Curie and her husband Pierre Curie were research partners. Photos.com/iStock via Getty ImagesBy the nature of her work, Marie Curie handled a lot of radioactive materials over her lifetime. Notable Marie Curie Quotes:"You cannot hope to build a better world without improving the individuals.