In the early 20th century dangerous and often poisonous chemicals were included in many common household products. Browse these pictures of medicines, liniments, moonshine and a cyanide furnace.
Corresponding educational resources for this photo gallery can be found on PBS LearningMedia.
Accused by a janitor, a respected Harvard professor was hanged for the murder of Dr. George Parkman, one of Boston's richest citizens, in 1849.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.
Bascom Lamar Lunsford and his campaign to preserve mountain music and dance.
The first around-the-world air race was sponsored to prove that the airplane had a commercial future.
Their intense faith and strict adherence to 300-year-old traditions have by turn captivated and repelled, awed and irritated, inspired and confused America.
The first woman to fly solo across the Atlantic, Earhart disappeared in 1937 during an attempt to circumnavigate the world by airplane.
Before World War II, young Chinese Americans defied cultural tradition in San Francisco's Chinatown, previously closed to outsiders.
In the decade after the Civil War, former slaves sing their way into a nation's heart with spirituals, the religious anthems of slavery.