Religion scholar Bart D. Ehrman on this edition of Fresh Air. He's the Bowman and Gordon Gray Professor of Religious Studies at UNC-Chapel Hill. His new book, Lost Christianities: The Battle for Scripture and the Faiths We Never Knew, chronicles the period before Christianity as we know it came to be, when conflicting ideas about the religion were fighting for prominence in the second and third centuries. Ehrman has also edited a collection of the early non-canonical texts from the first centuries after Christ called Lost Scriptures: Books that Did Not Make It into the New Testament. (Broadcast Date: December 17, 2003)