I've often been told I'm a pessimist or too-frequently see the glass as half-empty. Morbid thoughts cloud my head about disease, crime, global warming, and zombie uprisings. When I leave the house, I take a moment to make sure everything is in good order, in case I'm hit by a bus or something. Today, I feel at least partially vindicated by this article in Slate. Behold, the power of negative thinking!