Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness. As a result, the Wilderness Act passed in 1964.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The 300-year saga of the American whaling industry.
The inspiring story of the modern environmental movement.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.