Sagan, Carl Edward

US astronomer, author, and popularizer of science

professor of astronomy at Cornell University 1968-1996

popularized concept of nuclear winter

conceived idea of including message-bearing phonograph record on Voyager spacecraft

wrote nonfiction "The Dragons of Eden: Speculations on the Evolution of Human Intelligence" 1977 (Pulitzer Prize for nonfiction 1978), "Broca's Brain" 1979, "Cosmos" 1980, "The Demon-Haunted World: Science as a Candle in the Dark" 1996, novel "Contact" 1985

host of 13-part television documentary "Cosmos" 1980

1st husband of Lynn Margulis 1957 (divorced 1963)