The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
The unusual life of David Vetter, who lived permanently inside a germ-free environment due to severe combined immunodeficiency.
When two passenger ships collide off Nantucket in 1909, 1,500 people rely on 26-year-old Jack Binns to operate a new technology - wireless telegraphy - to save them all.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
Engineer James Eads tamed the mighty Mississippi, turning New Orleans into the second largest port in the nation.