A focus on principles offers an unintimidating introduction to evolution, perfect for a first course in the subject. New chapters on the role of development in evolution, on fossil record, co-evolution, and on evolutionary medicine and human evolution, and a completely rewritten chapter on phylogenetics give students an insight into these dynamic areas of research. Key concepts are defined and highlighted in the margin, helping to ensure that the information presented is crystal clear. An appendix of basic genetic concepts provides a firm foundation for those who have limited prior knowledge of genetics, opening up the subject to an even broader range of students. Striking photographs supplement the line drawings and illuminate key themes in the text, helping students to visualise the concepts described. Online Resource Centre includes figures available to download, to facilitate lecture preparation, and interactive simulations, plus additional questions and answers, to encourage independent learning