Shaking History By Christie Aschwanden At the end of the Bronze Age, over 50 Mediterranean cities fell during a 50-year period. Were earthquakes responsible? Undersea Flurries By Mary Beckman Miniature habitats of ocean life fall like snow and feed the deep sea. Breaking the Ice By Brandon Brown An oceanographer comes ashore to study a mysterious Antarctic lake. A Warming Argument By Lila Guterman Scientists who work with old plants and new computer models team up to understand Wyoming's warm winters of 55 million years ago. The Distiller of Dreams By Michael Hagmann With a novel statistical system, a psychologist opens up a new avenue to the meaning of dreams. Magic, Mirrors and Murres By Laura Helmuth High-tech decoys lure seabirds back to an abandoned nesting site. Sex and the Single X By Karin Jegalian Differences among sex chromosomes in mammals are not flukes. They represent intermediate stages that chronicle the evolution of a developmental process. Whupped With an Ugly Stick By Mitchell Leslie The fearsome visage of the Neandertal has puzzled anthropologists for a century. Now a scientist and an engineer at Stanford University may have found why the archetypal cave man had the face only a mother could love. Getting It Right By Evelyn Strauss An unconventional geneticist explores how fruit fly embryos fix mistakes to develop properly.