Polonium the Curies while they were investigating the cause of pitchblende radioactivity. Pitchblende, after removal of the radioactive elements uranium and thorium, was more radioactive than the uranium and thorium combined. This spurred the Curies to search for additional radioactive elements. They first separated out polonium from pitchblende in July 1898, and five months later, also isolated radium. German scientist Willy Marckwald successfully isolated 3 milligrams of polonium in 1902, though at the time he believed it was a new element, which he dubbed "radio-tellurium", and it was not until 1905 that it was demonstrated to be the same as polonium.
HPE Discover Messe Wien Congress Center, on November 29 through December 1, 2011. HPE Discover HPE Discover is the Hewlett Packard Enterprise showcase technology event for business and government customers. In 2011, HP Enterprise Business, along with participating independent user groups, combined its annual HP Software Universe, HP Technology Forum and HP Technology@Work into a single event, HP Discover. There are now two HPE Discover events annually, one for the Americas and one for Europe, Middle East and Africa (EMEA). Since the split of Hewlett-Packard into HP Inc and Hewlett Packard Enterprise, HP Discover was replaced with HPE Discover focusing on the