Merle Anthony Tuve died May 20, 1982, in Bethesda, Maryland, at the age of 80. His entire scientific life of more than 50 years was spent with the Carnegie Institution of Washington, except for his leave of absence to work with the Office of Scientific Research and Development during WWII. His personal research—and research was intensely personal with Merle Tuve—was in subjects as diverse as the ionosphere, the atomic nucleus, cosmic rays, the atmosphere, the earth's crust and mantle, and the Milky Way. As director of Carnegie's Department of Terrestrial Magnetism he initiated programs in explosion seismic studies of the crust, radiometric dating of rock, and biophysical research into the structure of genetic material. His range of interests and depth of knowledge was astounding. His physical insight was so profound that the questions he studied often were at the heart of complicated matters and disclosed his deep interests in science and in the work of his colleagues. They were characteristics that showed little evidence of diminishing with age.