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.
Accounting for America's most famous inventor and his role in America's future.
The grave truth behind modern forensics was discovered in 1920s New York.
The women's suffrage movement won the right to vote when the 19th Amendment passed in 1920.
Franklin Roosevelt restored hope after the Great Depression and led the nation during World War II. Part of the award-winning Presidents collection.
After 18 years of struggles, the Golden Gate Bridge opened on May 27, 1937.
Eleanor Roosevelt supported the President's New Deal and advocated for civil rights, becoming one of the 20th century's most influential women.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.