The Great Filter | Episode 18: Escape To Mars: Moving Humanity Off Planet

Impact threats are the most certain of any extinction-level events. Yet, despite the warnings of hundreds of scientists – we continue to dawdle in both our search for alternative, extraterrestrial, homes and the development of technologies to get there. Let’s take a really good look at this, shall we?

“All civilizations become either spacefaring or extinct.”
Carl Sagan (unsourced)

“Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring – not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive. And once you’re out there in space for centuries and millennia, moving little worlds around and engineering planets, your species has been pried loose from its cradle.”
Carl Sagan – Pale Blue Dot: A Vision of The Human Future in Space p 173

“If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds.”
Carl Sagan – Pale Blue Dot: A Vision of The Human Future in Space p 176

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Special thanks to NASA on Unsplash for the photo in this episode’s cover art.

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