Often referred to as America's national epic of exploration, the Lewis and Clark expedition was certainly America's greatest odyssey. Trained naturalists Lewis and Clark carefully and meticulously recorded the conditions of the rivers, prairies, forests, mountains, and wildlife of pre-industrial America. Now, in this new edition of Our Natural History, Daniel B. Botkin, a distinguished botanist and naturalist, re-creates the grand journey, revealing what this western landscape actually looked like and how much it's been changed by modern civilization and technology. With fresh insight, Botkin shows us that from the explorers' observations, we can learn much about the environment of our past, our environment today, and what our environment might be in the future.