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.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The New Deal program CCC put three million young men to work in camps across America.
This stunning film portrait of Yosemite National Park uses the 1851 diary of the first expedition of soldiers into the Native American territory.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.