Doctors Chiappe and Dingus led the research team which, on a field trip to the Patagonian desert in South America in 1997, discovered a field of eggs 80 million years old, some of which were still unhatched. Then, on a later expedition, they found a nearly complete skeleton of a completely new species of dinosaur. This is not only the compelling account of how these miraculous finds were made. Chapters describing field adventures are interwoven with others which deal with the processes and scientific models involved in solving the mysteries of this spectacular site and its ancient inhabitants. The book is also about the nature of scientific discovery and how such finds contribute to knowledge.