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.
Discover Financial the Diners Club International network from Citigroup for $165 million. In May 2008, the Federal Trade Commission approved the transaction and it finalized on July 1, 2008. Discover stated that the Diners Club network, which is a major network outside the United States, will be merged with the Discover Network, a major network in the United States, creating an international network for Discover and Diners Club cardholders. Diners Club cards will continue to be issued by Diners Club International licensees. At this time, Discover Bank has no plans on issuing Diners Club branded cards itself. On September 17, 2010, Discover