The contradictory history of a dam that became a statement of American power and prestige.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The New Deal program CCC put three million young men to work in camps across America.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.