Polonium initiator was classified until the 1960s. The Atomic Energy Commission and the Manhattan Project funded human experiments using polonium on five people at the University of Rochester between 1943 and 1947. The people were administered between of polonium to study its excretion. Polonium is a very rare element in nature because of the short half-life of all its isotopes. Po, Po, and Po appear in the decay chain of U; thus polonium can be found in uranium ores at about 0.1 mg per metric ton (1 part in 10), which is approximately 0.2% of the abundance of radium. The amounts
Discover the Networks Discover the Networks Discover the Networks (originally Discover the Network) (DtN) is a website run by the David Horowitz Freedom Center that focuses on the individuals, groups, and history of groups alleged to be politically left wing. DtN was launched in 2004 and has a staff of about a dozen contributors. Its current Editor-in-Chief is David Horowitz; John Perazzo is the project's managing editor, and Richard Poe is its investigative editor. Discover the Networks is associated with FrontPageMag.com. According to the project's mission statement, DtN's goal is to provide a comprehensive "guide to the political left" covering "the individuals and