The last 20 years have seen many exciting discoveries in the study of marsupials, leading to significant developments in our understanding of this unique group of mammals. The impact of these developments have been such that marsupials are coming to be seen as model organisms in studies of life history evolution, ageing and senescence, sex determination and the development and regeneration of the nervous system. This volume provides a synthesis of current knowledge, bringing together information scattered throughout the primary literature. Coverage includes evolutionary history and management strategies as well as all aspects of basic biology. A complete listing of currently known species and a comprehensive list of references make this a unique repository of information on this fascinating group of animals.