Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
The worst epidemic in American history killed over 600,000 Americans during World War I.
The remarkable story of mid-19th century ingenuity and perseverance during the laying of the transatlantic telegraph cable between North America and Europe.
The international race to develop biological weapons during the 20th century.
Native Alaskans, oil company representatives, environmentalists, politicians, and others tell the story of the 800-mile pipeline.
The first around-the-world air race was sponsored to prove that the airplane had a commercial future.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.
A marvel of engineering, architecture, and vision, the story of the Beaux Arts structure on 42nd street that forever changed midtown Manhattan.