J A N U A R Y 1 9 9 9Researchers with a variety of academic and theological interests are proposing controversial theories about the Koran and Islamic history, and are striving to reinterpret Islam for the modern world. This is, as one scholar puts it, a "sensitive business" by Toby Lester (The online version of this article appears in three parts. Click here to go to part two. Click here to go to part three.) N 1972, during the restoration of the Great Mosque of Sana'a, in Yemen, laborers working in a loft between the structure's inner and...