The large quadrupedal herbivores known as the sauropods roamed the planet from the Jurassic to the end of the Cretaceous. with the longest necks and tails of all of the dinosaurs, some sauropods were 40 meters in length and weighed upwards of 110 tons (100,000 kilograms). The popular image of these lumbering giants, placidly consuming ferns, has been greatly revised in recent years by new discoveries and new theories about behavior and physiology. This book presents twenty-one new studies of the sauropods. The volume is organized into four parts. Part One looks at some sauropods old and new, Part Two at juvenile and adult specimens and ontogenetic variation within species. Part Three concerns morphology and biomechanics, while Part Four takes up issues of biogeography.