George Abell, 57, astronomer whose discovery, the Abell Galaxy, was for many years the largest known object in the universe, 7 October 1983.

Luis W. Alvarez, 77, Nobel Prize-winning physicist and proponent of the theory that the dinosaur extinctions were caused by a comet striking the earth, 1 September 1988.

Frederik Barry Bang, 64, biologist and expert on parasitic disease, 3 October 1981.

Gregory Bateson, 76, British-born anthropologist and former husband and collaborator of Margaret Mead, 4 July 1980.

William Behrens, 63, naval admiral and oceanographer, 21 January 1986.

George Packer Berry, 87, virologist and dean of the Harvard Medical School (1949-1966), 5 October 1986.

Junius Bouton Bird, 74, prominent archaeologist with the American Museum of Natural History in New York, 2 April 1982.

Walter Houser Brattain, 85, physicist and coinventor of the transistor, 13 October 1987.

Harrison Brown, 69, atomic scientist who played a key role in developing the atomic bomb, 8 December 1986.

Kurt Heinrich Debus, 74, electrical and rocket engineer, director of the Kennedy Space Center at the time of the first moon...