As a girl in Poland, Maria Sklodowska was not allowed to study at university. Universities in her country accepted only men. So she worked for years as a teacher, saved money, and moved to Paris.
In Paris she studied physics, often forgetting to eat because she was so focused. With her husband Pierre, she discovered two new elements: polonium and radium. In 1903 she became the first woman ever to win a Nobel Prize. Eight years later she won a second one — in a different science.
During the First World War, she built mobile X-ray machines and drove them to hospitals herself. Her equipment helped doctors treat more than a million wounded soldiers. To this day, she is the only person with Nobel Prizes in two different sciences. Her advice to students was simple: "Nothing in life is to be feared, it is only to be understood."