Missing Links provides both a compendium of evidence supporting Charles Darwin s grand theory of evolution and an overview of some of the most fascinating chapters in the 3.5+ billion year history of biological diversity on planet Earth. Written in a substantive and accessible style, this revised and updated second edition of Missing Links will serve as a source of information for the general reader as well as an ancillary text for formal and informal courses in a variety of disciplines. The first section of Missing Links introduces readers to scientific thinking and methods of studying Earth s geological history, principles of classification and phylogenetic analysis, the role of ecology in the history of life, and perspectives on the origin and evolution of species.