Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
In 1927, the Mississippi River flooded from New Orleans to Illinois, leaving a million people homeless and leading to a major black migration to the North.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
High on a granite cliff in South Dakota's Black Hills tower the huge carved faces of four American presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.