This planet seems to be in such sorry shape. And I can't ever think about the rest of the universe without coming back home and thinking what the implications for life here would be if we were to really have some definitive proof of extraterrestrial life.

Interviewer: "Didn't [Sagan] want to believe?" Druyan: "He didn't want to believe. He wanted to know.

All of science to me, everything that we have learned, is important to the extent that it brings us to our senses.

We batter this planet as if we had someplace else to go.

Carl did not want to believe. He wanted to know.

The way he treated me & the way I treated him, the way we took care of each other & our family, while he lived. That is so much more important than the idea I will see him someday.

If you have a beating heart, that's good enough.