Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
Politics, culture, race relations, and technology in a year of change.
The remarkable story of how a railroad was built connecting California to the East.
The international race to develop biological weapons during the 20th century.
The grave truth behind modern forensics was discovered in 1920s New York.
Robert Noyce's invention of the microchip launched the world into the Information Age.
A Utah farm boy builds a prototype for a television, but is thwarted by movie studio executives wanting to control the technology.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.