See the Kepler data release schedule. Exoplanet Archive Kepler Resources General Documentation . Kepler Extended Mission data philosophy; How to request a Kepler number; How to request a K2 number; Search for a Kepler light curve; K2 Mission page
Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898, in a uraninite (pitchblende) sample. While studying the mineral earlier, the Curies removed uranium from it and found that the remaining material was still radioactive.
Marie and Pierre Curie and the Discovery of Polonium and Radium This lecture by Nanny Fr man at the Royal Academy of Sciences in 1996, is presented by the Nobel Foundation.