More quotes by Carl Sagan

"Extraordinary claims require extraordinary evidence."
"Somewhere, something incredible is waiting to be known."
"In that case, on behalf of Earthlife, I urge that, with full knowledge of our limitations, we vastly increase our knowledge of the Solar System and then begin to settle other worlds."
"We can't help it. Life looks for life."
"The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself."