The episodes range broadly and widely, but there's a through line, which is, it matters what's true. Not absolute truth. We don't get that! But these… - Ann Druyan

We have known about the dangers we pose to ourselves for decades and yet we continue sleepwalking toward a grim future, somehow numb to what it will mean for our children and theirs. Almost every depiction of our world's future in popular culture is a dystopian vision of a planet piled high with garbage, a ruined wasteland. They are accurate reflections of the fear in our hearts. But if dreams are maps, could a great dream of our future possibly help us find our way out of this nightmare?

These are stories that make me more optimistic about our future. Through them I have come to feel more intensely the romance of science and the wonder of being alive right now, at these particular coordinates in spacetime, less alone, more at home, here in the cosmos.

The vastness of the universe-and love, the thing that makes the vastness bearable-is out of reach to the arrogant.