Maria Skłodowska Curie 1867–1934) was a Polish physicist and chemist whose discoveries changed modern science. She is best known for: \t•\tDiscovering polonium and radium \t•\tNaming and defining radioactivity \t•\tPioneering radiation research and medical uses of X-rays \t•\tBecoming the first woman to win a Nobel Prize \t•\tAnd the only person ever to win Nobel Prizes in two different sciences — Physics (1903) and Chemistry (1911) Her work laid the foundations for nuclear physics, radiotherapy