Apparently Carl Sagan was a closeted homophobe: "Dear Mr. Derbyshire -- If you were not aware, Carl Sagan -- Yes, the happy, life-affirming, turtle-necked, warm-glow Carl Sagan -- was also mildly & tolerantly homophobic. "Two biographies on Sagan came out in 1999 and both (though one more than the other) were pained and hurt by some of the comments that would come out of Sagan's mouth. My favorite was that Sagan wasn't convinced that homosexuality was genetic, though if forced to accept that conclusion, he wanted it understood that homosexuality was a genetic deformity. Another was when Sagan discovered that...