Death by Euphoria. Dysgenics. Population Death Spiral. Genetic Superhumans. Geomagnetic Reversal. Galactic Collision. Strangelets. Whether we like it or not, everything`s going to come to a pretty unpleasant halt on our planet at some point in the future. What we don`t know is what form our extinction is likely to take. In this accessible and entertaining book, acclaimed writer Alok Jha explains the head-spinning apocalyptic science behind 50 horrifying doomsday scenarios.