The contradictory history of a dam that became a statement of American power and prestige.
It was the largest fire in American history: by the time it was all over, more than three million acres had burned and at least 78 firefighters were dead.
The story of the polio crusade pays tribute to a time when Americans banded together to conquer a terrible disease.
The Klondike Gold Rush in Canada's Yukon Territory saw 100,000 people make the treacherous journey in search of riches.
The remarkable story of mid-19th century ingenuity and perseverance during the laying of the transatlantic telegraph cable between North America and Europe.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
The Pennsylvania Railroad Company accomplished an enormous engineering feat, but destroyed a great architectural monument.