Carbon Chauvinism is a term coined by Carl Sagan which assumes that all extraterrestrial life must be made of carbon because carbon-based humans are unable to imagine life made of radically different biochemistries.
Carl Sagan’s team wanted to include the Beatles song “Here Comes the Sun” on the Voyager Golden Records (discs containing greetings in 60 languages, music and sounds from Earth aboard both Voyager spacecraft launched in 1977), but the record company EMI, which held the copyrights, declined.
Carl Sagan has a number named after him. Sagan’s number is approximately 300 sextellion and refers to the number of stars in the universe.
Carl Sagan was an avid marijuana user his entire life. “I am convinced that there are genuine and valid levels of perception available with cannabis (and probably with other drugs) which are, through the defects of our society and our educational system, unavailable to us without such drugs“.
After becoming associated with the catchphrase “billions and billions,” Carl Sagan had a unit of measurement named after him. One sagan is equal to at least four billion, since the smallest number that may be described as “billions and billions” must be two billion plus two billion.
Carl Sagan sued Apple for using his name as an internal code for the Macintosh 7100. In response Apple changed the name to BHA (Butthead Astronomer).
Carl Sagan coauthored a book arguing that the theory of ancient civilizations being contacted by advanced extraterrestrials should be seriously considered.