Sagan Carl Edward
Sa·gan
(sā′gən), Carl Edward 1934-1996. American astronomer noted for research on the possibility of extraterrestrial life and for speculation on the severity of a nuclear winter. His books include Dragons of Eden (1977).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.