Much of the credit for the digital revolution is owed to the early pioneers of Silicon Valley -- from transistor inventor William Shockley and the Traitorous Eight to investor Sherman Fairchild, Intel CEO Andy Grove and microprocessor inventor Ted Hoff. This photo gallery features 12 men whose work and innovations helped to launch the some of the most significant technological advances in history.
Martha Ballard was a midwife and mother in Maine following the American Revolution.
The contradictory history of a dam that became a statement of American power and prestige.
The dramatic story of the streamliners is one of remarkable achievements and opportunities lost.
The grave truth behind modern forensics was discovered in 1920s New York.
The trial of Charles Julius Guiteau, who assassinated President James A. Garfield, turned into a public battle over the meaning of insanity.
William "Buffalo Bill" Cody's legendary exploits helped create the myth of the American West that still endures today.
The remarkable story of how a railroad was built connecting California to the East.
A revealing portrait of one of America's most paradoxical leaders.