Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more . CNN  —  Researchers have found pages of a rare medieval manuscript masquerading as a cover and stitched into the binding of another book, according to experts at the Cambridge University Library in England. The fragment contains stories about Merlin and King Arthur. The two pages are from a 13th century copy of the “Suite Vulgate du Merlin.” The