HUMAN THREATS: Mass extinction; Global pandemic; The Doomsday machine; Mutually assured destruction; Terrorism; Death by euphoria; Overpopulation; Population death spiral. TECH: Cyberwar; Biotech disaster; Nanotech disaster; Artificial superintelligence. ENVIRONMENT: Transhumanism; Death of the bees; Invasive species; Desert Earth; Global food crisis; Water wars; Resource depletion; Environmental collapse; Rising sea levels; The Gulf Stream shuts down; Snowball Earth; Chemical pollution; Ozone destruction; Asteroid impact; Mega tsunami; Supervolcano; Oxygen depletion; Geomagnetic reversal; Superstorms. SPACE: Sun storms; Polar shift; Lethal space dust; Runaway black hole; Gamma rays from space; Vacuum decay; Solar collision; Scientists create a black hole; Hostile extraterrestrials; Death of the sun; Galactic collision; The end of time; Strangelets. GENETICS: Genetic superhumans; Dysgenics; Organic cell disintegration. THE FUTURE: It's all a dream; Information extinction; Unknown unknowns. Index.