For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.
Carl SaganWe have heard the rationales offered by the nuclear superpowers. We know who speaks for the nations. But who speaks for the human species? Who speaks for Earth?
Carl SaganI would love to believe that when I die I will live again, that some thinking, feeling, remembering part of me will continue.
Carl SaganWho are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.
Carl Sagan