When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
The contradictory history of a dam that became a statement of American power and prestige.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
A personal story of one family's dramatic effort to hold onto their family farm in Iowa as massive foreclosures sweep the nation in the 1990s.