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TALLAHASSEE, FL - 1984: Astrophysicist Carl Sagan poses before a Florida State University Distinguished Lecture Series speech at the Turnbull Conference Center in circa 1984 in Tallahassee, Florida. The original background of the image has been replaced by a NASA photo of the Cosmos. (Photo by Mickey Adair/ Michael Ochs Archives/ Getty Images)

TALLAHASSEE, FL - 1984:  Astrophysicist Carl Sagan poses before a Florida State University Distinguished Lecture Series speech at the Turnbull Conference Center in circa 1984 in Tallahassee, Florida. The original background of the image has been replaced by a NASA photo of the Cosmos. (Photo by Mickey Adair/ Michael Ochs Archives/ Getty Images)