From the Sumerian epic of Gilgamesh to Norse prophecies of Ragnarok to the Revelations of Saint John to Cormac McCarthy's The Road, and any number of fictional zombie Armageddons and the dystopic world of The Hunger Games, we have always wondered what will happen after the world as we know it ends. No matter what the doomsday scenario-cataclysmic climate change, political chaos, societal collapse, nuclear war, pestilence, or so many other dreaded variations-we inevitably believe that even thoug