This website, part of the American Institute of Physics site, is devoted to Ernest O. Lawrence, a prominent American physicist of the early and mid-twentieth century. The site presents a biography of Lawrence divided into time periods covering the most important events in his life and career, such as his invention of the first cyclotron, his participation in the Manhattan Project, his creation of the Berkeley Radiation Laboratory, and his job as a Cold War science advisor to the United States government. The biography is illustrated with photographs of Lawrence and people and objects involved in his life and includes quotations about him.