Her 1963 warnings about the effects of pesticides and herbicides - especially DDT - sparked a revolution in environmental policy and created a new ecological consciousness.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
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 journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
The New Deal program CCC put three million young men to work in camps across America.
The coal miners' battle for dignity led to the largest armed insurrection since the American Civil War.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.