Take a ride through the Panama Canal in this time-lapse video from 2010.
The story behind the development of the oral contraceptive that put women in control of birth control.
The coal miners' battle for dignity led to the largest armed insurrection since the American Civil War.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
Between 1854 and 1929 more than 100,000 abused or orphaned children were sent by train to the Midwest to begin new lives in foster families.
A marvel of engineering, architecture, and vision, the story of the Beaux Arts structure on 42nd street that forever changed midtown Manhattan.
Though first seen only as an expensive luxury, Alexander Graham Bell's telephone soon transformed American life and became a necessity.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.