Quotes from Nick Sagan

As a science-fiction writer, I feel my responsibility is to look ahead and see the dangers of what might happen and try to warn people of the potential pitfalls.

'Life in space is impossible,' we're warned, and amidst the hypnotic beauty of these heavens, we become painfully aware of what a hostile environment space is, how unforgiving, how unsympathetic to human desires.

Astonishingly powerful and poignant, 'Gravity' is the rarest of rares: a space survival film informed by a genuine reverence for the awe-inspiring cosmos we inhabit.

It goes back to the starfish. That's when the light bulb really popped over my head. We'd found one on the beach, and I was struck by what astonishing creatures they are, talking with Dad about how they regenerate.

Something my father dearly loved is the scientific method, and it's founded in this element of humility. The idea is that you pursue the truth wherever it goes; you need to evidence, and you can - you see if it's repeatable.

Beyond 'Contact,' I think there's something compelling about 'District 9.'

We're so bitterly divided these days, the appearance of a true 'other' might be the best chance of bringing us all together.

American sci-fi has fallen into the doldrums in part because of the anti-science sentiment that's so prevalent in our culture lately.

Higher levels of technology allow fewer people to do more damage.

Humans having any kind of sporting chance against hostile alien invaders armed with superior technology - Good luck. If they're advanced enough to cross the enormous distances of interstellar space, they're advanced enough to wipe us out without breaking whatever in their physiology passes for a sweat.

Dad was a difference maker. He reached out to people. He took them by the awe and wonder we feel over the most important questions we can think to imagine. He pulled them away from blind faith, away from pseudoscience, toward a deeper, richer understanding of the universe.

For a genre that's about looking to the future, science fiction has sure been looking backwards lately. Nostalgia is what sells best, with readers spending their money on movie tie-in novels and sequels to long-running series.

I'm thrilled to be working with the Science Channel. A chance to shine a light on the wonder and exciting possibilities of science with such a smart and talented team is a dream come true for me. It's very gratifying to me personally, and it's also a way to honor my family.

Here on Earth, we've found organisms that thrive in environmental conditions we would have once thought uninhabitable. The presence of these extremophiles suggests that life could potentially take hold on worlds other than our own.

There is a danger, increasingly, that we're in a post-fact society where it seems my ignorance is as good as your facts.

I think of 'Shrapnel' as the anti-'Star Trek.'

'Shrapnel' is based on the idea that we do colonize the solar system, but it's not clean and optimistic. The haves are putting the screws to the have-nots. The story is about the last stand of the last free colony in the solar system.

Human divisions would be child's play for any reasonably competent alien overlord to exploit - check the masterful 'Twilight Zone' episode 'The Monsters Are Due on Maple Street' for an example of how that might play out.

We have not been asking the serious questions about the future of our species, questions sci-fi regularly explores by showing us the best and worst of what could be.

My father was not only a planetary scientist and a great popularizer of science, but he thought very deeply about the world. He was a scholar, he studied history. He taught a class in critical thinking, and he was very, very aware of the directions we might go.

I've met secular humanists who grew up in evangelical households, for whom 'Cosmos' was their first exposure to a scientific way of viewing the world.

When I think of Simone now, I think of butterfly wings. Beautiful and excruciatingly delicate. Touch them once and they might disintegrate.

We fear the monster's capacity for evil because we recognize it in human hearts.

No existe justificación divina para el mal. Tal y como afirmaba Darwin: "Dios debe ser débil o perverso".