In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.
The impact of tuberculosis in America, once the deadliest killer in human history.
In 1960, Francis Gary Powers' U-2 spy plane was shot down over the Soviet Union.
The grave truth behind modern forensics was discovered in 1920s New York.
While the U.N. debated strategies for control of atomic energy, the U.S. Navy was preparing for nuclear tests on Bikini Island.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.
Robert Noyce's invention of the microchip launched the world into the Information Age.