The coal miners' battle for dignity led to the largest armed insurrection since the American Civil War.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
The most daring and innovative accomplishment at the turn of the 20th century.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.
This stunning film portrait of Yosemite National Park uses the 1851 diary of the first expedition of soldiers into the Native American territory.
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.