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.
This stunning film portrait of Yosemite National Park uses the 1851 diary of the first expedition of soldiers into the Native American territory.
The contradictory history of a dam that became a statement of American power and prestige.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
A daunting story of shipwreck, starvation, mutiny and cannibalism amongst a group left abandoned in the high Arctic.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.