Science fiction author Larry Niven once said, "The dinosaurs went extinct because they didn't have a space program. And if we become extinct because we don't have a space station, it'll serve us right." It's true that animal represents the fragility of life on Earth as powerfully as dinosaurs do. As space colonization advocates have long known, humanity's only chance at long term survival is getting the heck off this planet. If we were to successfully settle other worlds, it would be a kind of insurance policy against total extinction. So let's get star-trekking already!