The transcontinental railroad's construction touched the lives of hundreds of thousands of people. Some desired it, some built it, and some did everything in their power to stop it. Browse a photo gallery of settlers, Native Americans, and workers whose lives were affected by the railroad as it traversed the West.
George Eastman introduced the Kodak and Brownie camera systems and transformed photography into something anybody could do.
The historic journey of Apollo 8 captivated the world in 1968 -- a bright spot in a year marked by political assassinations, race riots, and the Vietnam War.
At the height of segregation, an unlikely alliance between a black medical genius and a white surgeon led to a pioneering medical breakthrough.
It was the deadliest workplace accident in New York City’s history.
The impact of tuberculosis in America, once the deadliest killer in human history.
The story of the polio crusade pays tribute to a time when Americans banded together to conquer a terrible disease.
The effort of pioneering researchers to conceive babies through in vitro fertilization.
In the early 1830s, Texas, ruled by Mexico, held 20,000 U.S. settlers and 4,000 Mexican Tejanos, forcing residents to pick sides.