Her 1963 warnings about the effects of pesticides and herbicides - especially DDT - sparked a revolution in environmental policy and created a new ecological consciousness.
The coal miners' battle for dignity led to the largest armed insurrection since the American Civil War.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
In 1927, the Mississippi River flooded from New Orleans to Illinois, leaving a million people homeless and leading to a major black migration to the North.
The New Deal program CCC put three million young men to work in camps across America.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.