The international race to develop biological weapons during the 20th century, the challenges scientists faced, and the moral dilemmas posed by their eventual success.
Engineered by William Barclay Parsons, the 21-mile, four-track route of the New York City Subway was the largest public works project in history.
In the summer of 1940, 10,000 children were sent from wartime Britain to the United States.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.
Robert E. Lee, the leading Confederate general of the American Civil War, remains a source of fascination and, for some, veneration.
The grave truth behind modern forensics was discovered in 1920s New York.
The contradictory history of a dam that became a statement of American power and prestige.
With over a million already dead, heroic American soldiers and nurses served in the closing battles of World War I.
The unusual life of David Vetter, who lived permanently inside a germ-free environment due to severe combined immunodeficiency.