Dinosaur bones have been discovered all over the United States. Explore some of America's most exciting dig sites on this interactive map.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
A six-hour series on how the West was lost and won, from the Gold Rush in 1848 until Wounded Knee in 1893.
The Last Stand, the final act of General George Custer's larger-than-life career, played out on a grand stage with a spellbound public engrossed in the drama. Part of the Wild West collection.
The New Deal program CCC put three million young men to work in camps across America.
The remarkable story of how a railroad was built connecting California to the East.
A central figure in the narrative of how the west was won, Wyatt Earp and his story became an American legend. Part of the Wild West collection.
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 contradictory history of a dam that became a statement of American power and prestige.