The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
The 300-year saga of the American whaling industry.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
The most daring and innovative accomplishment at the turn of the 20th century.
The contradictory history of a dam that became a statement of American power and prestige.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.