Dinosaur bones have been discovered all over the United States. Explore some of America's most exciting dig sites on this interactive map.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The most daring and innovative accomplishment at the turn of the 20th century.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
This stunning film portrait of Yosemite National Park uses the 1851 diary of the first expedition of soldiers into the Native American territory.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
The Last Stand, the final act of General George Custer's larger-than-life career, played out on a grand stage with a spellbound public engrossed in the drama. Part of the Wild West collection.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.