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.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
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.
She set out to save a species… us.
The contradictory history of a dam that became a statement of American power and prestige.
The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
The inspiring story of the modern environmental movement.
Vivid memories of those trapped in the terrifying temblor of 1906 that killed thousands of Californians.