President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
The epic battle waged over dinosaur fossils by rival paleontologists in 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 300-year saga of the American whaling industry.
The New Deal program CCC put three million young men to work in camps across America.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.