On April 22, 1970, more than 20 million Americans gathered on college campuses and in city squares to celebrate the first Earth Day. Some came to spread the word, others came to learn, but all were a part of the largest organized demonstration in American history. See these snapshots of events around the country.
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.
Follow seven former Amish who choose their freedom over their family
Thoroughbred racehorse Seabiscuit was the long shot that captured America's heart during the Depression.
The first woman to fly solo across the Atlantic, Earhart disappeared in 1937 during an attempt to circumnavigate the world by airplane.
A star in baseball's golden age, Joe DiMaggio's celebrity status and tumultuous marriage to Marilyn Monroe brought him pain.
The internationally famous carnival of delights in New York was the birthplace of the hot dog and the roller coaster.
Politics, culture, race relations, and technology in a year of change.
Television game shows became an instant national phenomenon in 1955, but four years later contestant Charles van Doren admitted they were a scam.