Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
High on a granite cliff in South Dakota's Black Hills tower the huge carved faces of four American presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt.
The 300-year saga of the American whaling industry.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
The New Deal program CCC put three million young men to work in camps across America.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.