The Extreme Earth set presents the geology of notable land reforms, with clear explanations of their origins, histories, and structures. Similarities exist, of course, among the many mountains of the world, just as they exist among rivers, caves, deserts, canyons, waterfalls, lakes, and ocean ridges and trenches. Some qualify as the biggest, highest, deepest, longest, widest, oldest, or most unusual; these are the examples singled out in this set. Each volume introduces 10 superlative examples of the individual landforms and reveals why these landforms are never static, but always changing. Every chapter includes material on environmental challenges and reports on science in action, with details on field studies conducted at each site. All the books include black-and-white and full-color photographs, line drawings, a glossary of scientific terms related to the text, a listing of resources for more information, and an index.