Marie Curie was a physicist and chemist who conducted pioneering research on radioactivity, a term she coined. She was the first woman to win a Nobel Prize and remains the only person to win Nobel Prizes in two different scientific fields: Physics (for the discovery of radioactivity) and Chemistry (for the discovery of the elements polonium and radium). During World War I, she developed mobile radiography units, known as 'petites Curies,' to help surgeons treat wounded soldiers on the front lines. Despite facing intense sexism in the scientific community—she was once denied a seat in the French Academy of Sciences—her work revolutionized our understanding of the atom. Unfortunately, the long-term exposure to radiation during her experiments led to her death from aplastic anemia. To this day, her laboratory notebooks are so radioactive that they must be kept in lead-lined boxes and handled with protective gear.