President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The story of the farmers who dreamed of prosperity and lived through ten years of drought, dust, disease and death.
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.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
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.