Marie Sklodowska Curie was a pioneering female scientist who made groundbreaking discoveries in radioactivity. She was the first woman to win a Nobel Prize, which she received in 1903 along with her husband Pierre Curie and Henri Becquerel for their research on radioactivity. She was later awarded a second Nobel Prize, making her the only person to win Nobel Prizes in two different sciences. Her discoveries of radium and polonium transformed scientific understanding of atomic structure and nuclear power. Though her work exposed her to dangerous levels of radiation, she remained deeply committed to scientific truth and its ability to improve lives. Her life and work inspired many, especially in America where she was warmly received during visits in the 1920s