Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
At the height of segregation, an unlikely alliance between a black medical genius and a white surgeon led to a pioneering medical breakthrough.
Robert Moses fueled some of the most ambitious -- and controversial -- public works projects ever conceived.
The story behind the development of the oral contraceptive that put women in control of birth control.
The international race to develop biological weapons during the 20th century.
Engineer James Eads tamed the mighty Mississippi, turning New Orleans into the second largest port in the nation.
The tale of oil-seeking mavericks whose risk-taking, sweat and dreams changed an American industry.