115 years since Marie Curie, Pierre Curie isolated radium
On April 20, 1902, Marie Curie along with her husband Pierre successfully isolated radioactive radium salts from the mineral pitchblende in Paris. In 1898, the Curies had discovered the existence of elements radium and polonium. The couple won the 1903 Nobel Prize in Physics which was shared with fellow French scientist Antoine Henri Becquerel for their research on 'spontaneous radioactivity'.