Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
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 journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
The most daring and innovative accomplishment at the turn of the 20th century.