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 Wisconsin Discover Wisconsin Discover Wisconsin is a weekly non-fictional television program which encourages tourism in the U.S. state of Wisconsin and features profiles of cities, events and tourist attractions throughout the state. The program is written, directed and produced in Madison, Wisconsin and is billed as the longest running tourism TV show in the United States. The program has won 20 National Telly Awards. Discover Wisconsin has also been nominated for 8 Emmy nominations, winning once in 2012 for its 25th Anniversary Special. Dick Rose came up with the idea for a show in 1986 to showcase Wisconsin vacation spots. Discover