Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
The tale of oil-seeking mavericks whose risk-taking, sweat and dreams changed an American industry.
Robert Noyce's invention of the microchip launched the world into the Information Age.
During the Great Depression, Americans built the Hoover Dam, one of the greatest engineering works in history.
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.
The international race to develop biological weapons during the 20th century.