(1934 – 1996) Planetary astronomer and public intellectual. Professor at Harvard and Cornell, Sagan won the Pulitzer Prize in 1978 for The Dragons of Eden, which explored human intelligence. While he became a host on the PBS series Nova, he also became a science “star” with his Cosmos series (PBS, 1980–1), whose vivid explanations of the universe attracted a global audience as well as frequent satires of his hyperbolic delivery. Sagan was also active in establishing exobiological studies and working with those interested in the search for extra-terrestrial intelligent life.