Learn about radioactivity in uranium, in this clip from Uranium: Twisting the Dragon's Tail. When Marie Curie became the first female Doctor of Physics in France, Ernest Rutherford and his partner Frederick Soddy decided to further expanded upon her study. They found that when uranium releases radition, it can transform itself into new or different elements which they called "daughters." Hear Derek explain how over time uranium can change into fourteen "Daughters" which end up as lead