This text introduces the complex and fascinating subject of biological evolution in an engaging manner. The book begins with a thorough discussion of Darwin's theory of evolution and his ideas for how new species develop over time. He follows this with a comprehensive review of the alternative theories of mechanisms that result in new species. Elegant illustrations, numerous tables, and the author's conversational writing style make this an informative and accessible text. Features: * An historical view of the developments of ideas is integrated throughout the text. Price presents the wide diversity of viewpoints as they were held by the scientists who wrote them, giving students insight into how theories have developed. * Price quotes directly from Darwin, inviting students to consider his theories and to enter into the debate about what Darwin really intended. * Unanswered questions are featured throughout the text and provide students with a view into the ongoing process of science and problems that are yet to be solved. * The text features a broad array of taxonomic coverage including larger animals, terrestrial plants, and smaller organisms such as insects, fungi and microorganisms. * Extensive pedagogy includes challenging end-of-chapter questions which stimulate discussion and debate. Numerous figures and tables which offer a visual illustration of the topic, outlines and summaries in each chapter, end-of-chapter bibliographies, Species and Author indices, and an extensive glossary are also included.