A lively, illustrated youth-oriented account traces expeditions and museum work that uncover prehistoric creatures, blending field adventures with scientific explanation. It follows young enthusiasts and museum scientists as they excavate fossils across deserts, river quarries, and frozen wastes, describe restorations and debates about sea-serpents and dragon legends, and present anatomical and life reconstructions of dinosaurs, primitive horses, mastodons, early whales, and flying reptiles. Chapters alternate between narrative field episodes and accessible natural-history exposition, emphasizing methods of discovery, preparation, and exhibition while celebrating the excitement of finding and interpreting ancient remains.