Marie Curie was a brilliant scientist who discovered two new elements and pioneered the study of radioactivity in the early 1900s. Born in Poland in 1867 as Maria Sklodowska, she moved to Paris to study physics and chemistry when women in her homeland couldn't attend university. Working in a converted shed with primitive equipment, she and her husband Pierre discovered the elements polonium (named for her beloved Poland) and radium. Her work was so groundbreaking that she became the first woman to win a Nobel Prize, and later became the only person ever to win Nobel Prizes in two different sciences: physics and chemistry.

Curie's discoveries revolutionized medicine and science. She figured out that certain elements naturally give off powerful rays of energy, a phenomenon she named radioactivity. During World War I, she helped equip and drove mobile X-ray vehicles to the front lines, helping doctors locate bullets and broken bones in wounded soldiers, saving countless lives.

She studied by candlelight as a girl because Poland was occupied by Russia, worked as a governess to save money for school, and faced scientists who dismissed her because she was a woman. Yet her meticulous research and careful measurements proved skeptics wrong and changed our understanding of matter itself.