title: In memoriam:  James B. Pollack (1938-1994).
authors.affiliation: NASA/Ames Research Center, USA.
authors.forename: B
authors.initials: B
authors.lastname: Toon
authors.forename: J
authors.initials: J
authors.lastname: Cuzzi
authors.forename: C
authors.initials: C
authors.lastname: Sagan
mesh_terms: D001256:Astronomy / Q000266:history*; D018559:Exobiology / Q000266:history; D005118:Extraterrestrial Environment; D049673:History, 20th Century; D016083:Planets; D014481:United States; D018557:United States National Aeronautics and Space Administration