The First Edition of Earth: Portrait of a Planet revolutionized the study of geology by integrating traditional geological concepts with the most recent theoretical advances in geology, including theories of plate tectonics and earth systems science. Adopted at over 300 schools worldwide, this innovative text has quickly become the best-selling introductory text in the field. Retaining the core strengths of the First Edition, the Second Edition has been meticulously revised, adding engaging new material and learning tools. The text\'s popular art program has been significantly expanded, including new satellite photographs and eighteen new "What a Geologist Sees" illustrations. Additionally, the Second Edition features the most effective and current multimedia tools available for instructors and students.