The 300-year saga of the American whaling industry.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
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.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
A personal story of one family's dramatic effort to hold onto their family farm in Iowa as massive foreclosures sweep the nation in the 1990s.
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.
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.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.