GREENSTEIN, George. American, b. 1940. Genres: Astronomy. Career: Yeshiva University, New York, NY, research associate, 1968-70; Princeton University, Princeton, NJ, research associate at university observatory, 1970-71; Amherst College, Amherst, MA, assistant professor, 1971-77, associate professor, 1977-83, professor of astronomy, 1983-, chairman of Five-College Astronomy Department, 1981-84. Publications: Frozen Star: Of Pulsars, Black Holes, and the Fate of Stars, 1984; The Symbiotic Universe: Life and Mind in the Cosmos, 1988; The Quantem Challenge: Modern Research on the Foundations of Quantem Mechanics, 1997; Portraits of Discovery: Profiles in Scientific Genius, 1998. Author of technical and nontechnical articles. Address: Raines & Raines, 71 Park Ave, New York, NY 10016, U.S.A.