The famous scientist known for his work on radioactivity and recipient of two Nobel Prizes is Marie Curie. She was the first person to receive Nobel Prizes in two separate scientific fields—Physics and Chemistry. Curie's groundbreaking research on uranium radioactivity led to the discovery of polonium and radium, fundamentally impacting the fields of medical treatment and nuclear physics. Her pioneering spirit and contributions have left an enduring legacy in science, inspiring future generations of women in science and technology.