The first A-Z resource on the history of science from 1900 to 1950 examining the dynamic between science and the social, political, and cultural forces of the era. * Over 200 A-Z entries on the key scientific discoveries, thinkers, practices, and political and cultural influences of the period * Over 80 photographs of important scientists and events, including Marie Curie at work in the laboratory where she isolated pure Radium, Clarence Darrow at the Scopes evolution trial in July 1925, and the wrecked framework of the Museum of Science and Industry in Hiroshima shortly after the dropping of the first atomic bomb