This remarkable encyclopedia uniquely encapsulates the world of nature in one volume. Its text and illustrations carry the reader from individual cells, through organisms in all their variety in natural environments, to the current debates on evolution and on the origin of the h species. A unified approach eliminates rigid divisions between disciplines so that the general reader can more easily appreciate the fascination of the study of life processes and obtain an integrated picture of living organisms. The volume as a whole is lavishly illustrated with specially prepared diagrams and drawings and with carefully selected photographs. A classification of living organisms is given, and the lists of further reading ensure the book's continuing value as a reference work. It is a completely topical account, which reflects the fast-moving state of the life sciences.