Science comes alive in Lynett Gillette's story of the remarkable discovery of fossils at Ghost Ranch, where, 225 million years ago, hundreds of Coelophysis dinosaurs perished "in a tangle of necks, tails, arms, and legs." What catastrophe caused their death and burial? In considering the various scenarios — volcano? flood? poisoned water? asteroid? — Gillette painlessly introduces young readers to the scientific method. Profusely illustrated, with haunting paintings by Douglas Henderson.