Looters at Iraq's National Museum of Antiquities pillaged and, perhaps, destroyed an archive of more than 100,000 cuneiform clay tablets -- a unique and priceless trove of ancient Mesopotamian writings that included the "Sippar Library," the oldest library ever found intact on its original shelves. Experts described the archive as the world's least-studied large collection of cuneiform -- the oldest known writing on Earth -- a record that covers every aspect of Mesopotamian life over more than 3,000 years. The texts resided in numbered boxes each containing as many as 400 3-inch-by-2-inch tablets. The Sippar Library, discovered in 1986 at...