Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
A personal story of one family's dramatic effort to hold onto their family farm in Iowa as massive foreclosures sweep the nation in the 1990s.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.