Tell us what you think of the flu — do you think there is a significant threat of a major outbreak today like there was in 1918?
They were the first to brave the unknown.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
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 historic journey of Apollo 8 captivated the world in 1968 -- a bright spot in a year marked by political assassinations, race riots, and the Vietnam War.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
The grave truth behind modern forensics was discovered in 1920s New York.