Wikipedia:Main Page history/2020 July 16
From today's featured articleK-25 was the Manhattan Project codename for the program that produced enriched uranium for atomic bombs using the gaseous diffusion method at the Clinton Engineer Works in Oak Ridge, Tennessee, in the United States. When the production facility was built in 1944, the four-story gaseous diffusion plant (pictured) was the world's largest building, with over 152,000 square metres (1,640,000 sq ft) of floor space. At the height of construction, over 25,000 workers were employed on the site. Slightly enriched uranium from the S-50 thermal diffusion plant in the form of the highly corrosive uranium hexafluoride was fed into the K-25 gaseous diffusion plant; its product in turn was fed into the Y-12 electromagnetic plant. The enriched uranium was used in the Little Boy atomic bomb used in the atomic bombing of Hiroshima. Production of enriched uranium ended in 1964, gaseous diffusion ceased in 1985, and demolition of the facility was completed in 2017. (This article is part of a featured topic: History of the Manhattan Project.)
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Francesco Alidosi (1455–1511) was an Italian cardinal and condottiero. He accompanied Giuliano della Rovere to France in 1494, and continued to serve him when della Rovere became Pope Julius II. Alidosi was elected the bishop of Mileto in 1504, and was transferred to the see of Pavia in 1505. He exerted much influence over the pope, who put great trust in him; however, he also made many enemies. In 1510, he was accused of high treason, but persuaded the pope that Francesco Maria I della Rovere, Duke of Urbino, was in fact the guilty party. The duke was infuriated and had Alidosi killed by his troops. This oil-on-panel painting, entitled Portrait of a Cardinal, was painted by Italian Renaissance artist Raphael around 1510; the identity of the sitter is uncertain, but may be Alidosi. The work is in the collection of the Museo del Prado in Madrid, Spain. Painting credit: Raphael
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