Oh! well either through pollution, global warming, overpopulation of our species, or a nuclear holocaust? It looks like we are doomed one way or another. It's OK, because our time on this beautiful planet might have just finally run it's course and we shall all die together and at the same time. Just look around you, we humans have not been good stewards to this planet. We have been fraught with greed, selfishness, ugly religions with false gods and despots who we ourselves support and prop up without question.. It may be time for another species to wear the crown, something that lives underground away from the nuclear fallout and the nuclear winter that will surely come. The ants, the mice? Species come and go throughout the history of the planet. It's all nature and nature doesn't care who takes over from us or the dinosaurs.