Polonium in the Earth's crust are not harmful. Polonium has been found in tobacco smoke from tobacco leaves grown with phosphate fertilizers. Because it is present in small concentrations, isolation of polonium from natural sources is a tedious process. The largest batch of the element ever extracted, performed in the first half of the 20th century, contained only (9 mg) of polonium-210 and was obtained by processing 37 tonnes of residues from radium production. Polonium is now usually obtained by irradiating bismuth with high-energy neutrons or protons. In 1934, an experiment showed that when natural Bi is bombarded with neutrons, Bi
Discover Financial Financial announced it would acquire Citigroup-owned Student Loan Corporation for $30/share. The deal finalized on December 31. On June 6, 2012, Tree.com, Inc. completed the sale of substantially all of the operating assets of its Home Loan Center, Inc. business to a wholly owned subsidiary of Discover Financial. In exchange for the assets sold, Discover paid an aggregate of $45.9 million including payments made prior to the closing which were applied to the closing price. On June 12, 2012, Discover began originating mortgages with its launch of Discover Home Loans, offering prime variable- and fixed-rate conventional and FHA home mortgage