Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness. As a result, the Wilderness Act passed in 1964.
The contradictory history of a dam that became a statement of American power and prestige.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.
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.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
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.