Thus the recent rapid evolution of human intelligence is not only the cause of but also the only conceivable solution to the many serious problems that beset us.
Carl SaganI think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.
Carl SaganYou mustn't think of the Universe as a wilderness. It hasn't been that for billions of years," he said. "Think of it more as... ..cultivated.
Carl Sagan