World History Minute: The first massively printed book.

World History Minute: The first massively printed book.
World History Minute: The first massively printed book.

World History Minute: The first massively printed book.

Historian John Schmidt and Jerome McDonnell talk about the revolutionary date of February 23, 1455, when mass printing began. PHOTO: An original Guttenberg Bible on display at the New York Public Library. (Joe Shlabotnik/Flickr)