Wyniki wyszukiwania:

The early Mesozoic period was a critical period in the evolution of life on land when most of todays major groups of terrestrial vertebrates arose and dinosaurs and pterosaurs rose to prominence. In recent years this period has received a great deal of attention from palaeontologists, and it is now felt that the small vertebrates which lived in the shadows of the first dinosaurs tell us a great deal about the evolution of modern terrestrial ecosystems. This book is an attempt to collate all the information on the small vertebrates and features contributions by experts with international...

This book is the first attempt to collate all the information known to date on the small vertebrates, e.g. mammals, crocodiles, turtles, lizards, frogs, salamanders, etc., and features contributions by experts with international reputations in their fields. There are chapters on the taxonomy and phylogeny of the key vertebrate groups followed by a section dealing with the most significant fossiliferous assemblages worldwide. The final section looks at how faunal turnover at this time is measured and examines the possibility of mass extinctions.

Evolutionary biologists have long been concerned by the incompleteness of the fossil record. Although our knowledge of the diversity of life in 'deep time' has improved, many lineages of extant animals and plants still have only sparse fossil documentation. Even groups with 'hard parts' that render them suitable for fossilization often only have a limited record. Thus, although the fossil record is viewed as critical to the reconstruction of the evolutionary history of life, many biologists question its utility. Fortunately, discoveries of occurrences of exceptionally preserved fossils, known...

Nicholas Guyatt offers a completely new understanding of a central question in American history: how did Americans come to think that God favored the United States above other nations? Making sense of previously diffuse debates on manifest destiny, millenarianism, and American mission, Providence and the Invention of the United States explains the origins and development of the idea that God has a special plan for America. The benefits and costs of this idea deserve careful consideration.