President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
The 300-year saga of the American whaling industry.
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.
The most daring and innovative accomplishment at the turn of the 20th century.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.
The journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.