Since 2001, when the previous edition of this award-winning encyclopedia was published, new advances in molecular evolution and changes in how scientists view the classification of mammals resulted in a restructuring of the older classification system. This new approach means that certain animals, such as moles, shrews, and insectivores, are now reclassed based on molecular and other biological evidence that has been collected over the last five years. In three comprehensive, beautifully illustrated volumes, ""The Encyclopedia of Mammals, Second Edition"" brings the extensive research on this topic up to date as it reflects the latest thinking on mammalian evolution. All information in this set has been reviewed, updated, and expanded from the first edition, including six new special feature sections and an abundance of full-color photographs and illustrations. With the emergence of new archaeological evidence, the discussion of the age and evolution of man has been reopened, and this set addresses the role and development of mammalian evolution in the 21st century. Written by a team of advisory editors and some of the world's leading biologists, ""The Encyclopedia of Mammals, Second Edition"" remains unparalleled in scope and authority. New features include: current information on various threats to endangered species during the 21st century; two new essays covering recent developments in mammalian conservation; a completely new essay in the Primates section on the evolution of hominids; and a featured essay on man as a single species.