Carl Sagan Quotes
It's hard to kill a creature once it lets you see its consciousness.
Sagan, Carl, and Ann Druyan. Shadows of Forgotten Ancestors: A Search for Who We Are. Random House, 1992.
Wilberforce was one of the early staunch opponents of slavery.
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.