The contradictory history of a dam that became a statement of American power and prestige.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The most daring and innovative accomplishment at the turn of the 20th century.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
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.
A daunting story of shipwreck, starvation, mutiny and cannibalism amongst a group left abandoned in the high Arctic.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.