or, UN-sure way. No species has lasted up past 1,000,000 years, and assuming we don't kill ourselves, the adverse affects that we have inflicted on nature will. And cosidering that dinosaurs never ruined the environment, we aren't exactly clean living. Even still, humanity may have a way, because of intelligence, to circumvent those problems. Everything so far has run a sort-of pattern for extinction, and we may be, more or less, done with before the next big one. I kinda doubt it though.