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 epic battle waged over dinosaur fossils by rival paleontologists in the American West.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
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.
A daunting story of shipwreck, starvation, mutiny and cannibalism amongst a group left abandoned in the high Arctic.
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.
The most daring and innovative accomplishment at the turn of the 20th century.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.