In 1967, thousands of hippies flocked to San Francisco's Haight Ashbury district.
Robert Noyce's invention of the microchip launched the world into the Information Age.
Intrepid journalist Nelly Bly went on a journey around the world breaking the record of Julius Verne's fictional character.
The life story of Aimee Semple McPherson, religious evangelist instrumental in bringing conservative Protestantism into mainstream culture.
America's first great songwriter, Stephen Foster, wrote 200 songs but died a penniless alcoholic at 37.
Before World War II, young Chinese Americans defied cultural tradition in San Francisco's Chinatown, previously closed to outsiders.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.
John Scopes' free speech trial pitted science against religion after the teacher presented Charles Darwin's theory of evolution in a Tennessee school.