In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
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.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.