Curie, Marie (born Sklodovska) 1867-1934. Polish scientist, who investigated radioactivity, and with her husband Pierre (1859-1906) discovered radium. Born in Warsaw, she studied in Paris from 1891. Impressed by the publication of Becquerel's experiments, Marie Curie decided to investigate the nature of uranium rays. In 1898 she reported the possible existence of some new powerful radioactive element in pitchblende ores. Her husband abandoned his own researches to assist her, and in the same year they announced the existence of polonium and radium. They isolated the pure elements in 1902. Both scientists refused to take out a patent on their discovery, and were jointly awarded the Davy Medal (1903) and the Nobel Prize for Physics (1903; with Becquerel). In 1904 Pierre was appointed to a chair in physics at the Sorbonne, and on his death in a street accident was succeeded by his wife. She wrote a Treatise on Radioactivity in 1910, and was awarded the Nobel Prize for Chemistry in 1911. She died a victim of the radiation among which she had worked in her laboratory.