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Brunelleschi designed the central nave, with the two collateral naves on either side lined by small chapels, and the old sacristy. The first stage of the project was the Old Sacristy, built between 1419 and 1429. It contains the tomb of Giovanni di Bicci de' Medici and his wife, beneath a central dome, simply decorated. The chapel is a cube of ...
The Atomic Age, also known as the Atomic Era, is the period of history following the detonation of the first nuclear weapon, The Gadget at the Trinity test in New Mexico on 16 July 1945 during World War II.
The United States tested the first nuclear weapon in July 1945, the Trinity test, with the atomic bombings of Hiroshima and Nagasaki taking place one month later. In August 1945, the first widely distributed account of nuclear energy, the pocketbook The Atomic Age, [14] was released.
The world’s first production scale reactor built at the Hanford nuclear site near Richland in Eastern Washington changed the course of history, as its operation launched the Atomic Age.
It is the world's third reactor, the first built for continuous operation, the first reactor for the production of plutonium-239. [27] 1944. On March 19, Takeuchi Masa of the Japanese nuclear weapons program's Riken laboratory constructs the country's first Clusius tube thermal diffusion design for uranium enrichment. [34]
Britain and France built their own systems in the 1950s, and the number of states with nuclear capabilities has gradually grown larger in the decades since. A nuclear weapon, also known as an atomic bomb, possesses enormous destructive power from nuclear fission, or a combination of fission and fusion reactions.
1941 – May – A review committee postulates that the United States will not isolate enough uranium-235 to build an atomic bomb until 1945. [6] 1941 – June – President Roosevelt forms the Office of Scientific Research and Development under Vannevar Bush. 1941 – June 15 – The MAUD Committee approves a report that a uranium bomb could ...
J. Robert Oppenheimer (born Julius Robert Oppenheimer; / ˈ ɒ p ən h aɪ m ər / OP-ən-hy-mər; April 22, 1904 – February 18, 1967) was an American theoretical physicist who served as the director of the Manhattan Project's Los Alamos Laboratory during World War II.