During the Great Depression, Americans built the Hoover Dam, overcoming technical challenges to erect one of the greatest engineering works in history.
The contradictory history of a dam that became a statement of American power and prestige.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
Politics, culture, race relations, and technology in a year of change.
Accounting for America's most famous inventor and his role in America's future.
At the height of segregation, an unlikely alliance between a black medical genius and a white surgeon led to a pioneering medical breakthrough.
Postwar New York City and the global economic order told through the story of the World Trade Center.
A six-hour series on how the West was lost and won, from the Gold Rush in 1848 until Wounded Knee in 1893.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.