Less than 150 years have elapsed since the publication of Darwin's seminal work on evolution by natural selection, yet in this short period of time evolutionary theory has transformed our thinking in all aspects of human endeavor. The rapid progress that has been made, particularly in the last decades, is reflected in this book, which illustrates many key advances in the field and provides a sampler of the diversity of questions and research approaches that constitute the modern study of evolution. With contributions from leading experts, "Evolution: From Molecules to Ecosystems" addresses issues ranging from the fate of mutations to the origin of new genes, from mechanisms of speciation to patterns of radiation after mass extinctions, from recent migrations to ancient relationships, from symbiosis to virulent disease, and from the origin of play to perceptions of beauty. The book is designed to be advanced and up-to-date, but at the same time accessible and relevant to readers from the fields of genetics, ecology, animal behavior, anthropology and evolutionary biology. It will be particularly useful as a companion text for introductory and upper level courses in evolutionary biology.