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Video of skit from The Tonight Show Starring Johnny Carson mentioning "billions and billions"

BBC Radio program "Great Lives" on Carl Sagan's life

A Man whose time Has come—Interview with Carl Sagan by Ian Ridpath, New Scientist 1974 July 4

Carl Sagan Prize for Science Popularization

Carl Sagan Center for the Study of Life in the Universe, SETI Institute

Carl Sagan's Life and Legacy as Scientist, Teacher, and Skeptic, Committee for Skeptical Inquiry

A Tribute to Carl Sagan: Our Place in the Universe, The Skeptics Society

Sagan Medal for Excellence in Public Communication in Planetary Science, presented by the American Astronomical Society's Division for Planetary Sciences (AAS/DPS)