Marie Curie was a pioneering scientist who made groundbreaking discoveries in the field of radioactivity. Her first name was Marie, which is a five-letter word that can be found in many crossword puzzles. Marie Curie was the first woman to win a Nobel Prize and the only person to win two Nobel Prizes in two different scientific fields. She was also the first female professor at the University of Paris. Marie Curie's work has had a lasting impact on the world of science and medicine.