Over the years, Marie’s constant work with radium continued to hurt her health. She died on July 4, 1934, from an illness caused by her life’s work: radium. Madam Curie never cared about making any money from her discoveries. Her life had been one of hard work; however, in her family life she was happily married and had two daughters. As a scientist, she made important discoveries and achieved greatness in her field.