Carl Sagan Quotes


Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the other, with the same female), we might guess that promiscuous societies were uncommon in the immediate human past.


Citations

Sagan, Carl, and Ann Druyan. Shadows of Forgotten Ancestors: A Search for Who We Are. Random House, 1992, p. 192.

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Carl Sagan
Carl Sagan
  • Born: November 9, 1934
  • Died: December 20, 1996
  • Nationality: American
  • Profession: Scientist

Carl Edward Sagan was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space: the Pioneer plaque and the Voyager Golden Record, universal messages intended to be understood by any extraterrestrial intelligence that might find them.