Learn about the discovery of Radium, in this clip from Uranium: Twisting the Dragon's Tail. Professor Henry Becquerel in 1896 experiemented with uranium's fluorescence and found that it left marks on his photographic film. His student Marie Curie studied this energy further and found that it is a completely new element named Radium which released more energy than uranium. Watch how Marie Curie called this radioactivity and her husband helped discovered a practical application for Radium of treating disease.