Becquerel, Henri. 1852-1908. French discoverer of Uranium radioactivity, 1896. Curie.

Curie, Irene. Joliot-Curie.

Curie, Marie. 1867-1934, and Pierre 1859-1906. Polish/French discoverers of radium, 1898.

Joliot-Curie, Frédéric. 1900-58, and Irène. 1897-1956. Discovered Uranium fission 1934. Artificial radioactive substances.