20 April 1902 Posted on April 20, 2014 by Staff Pierre and Marie Curie refine radium chloride. Famous Words of Inspiration..."If you go on with this nuclear arms race, all you are going to do is make the rubble bounce." Winston Churchill — Click here for more from Winston Churchill Related posts: 26 December 1898 1 September 1902 1 September 1902 20 April 1998 20 April 1999