The Dead Sea Scrolls are widely considered to be one of the greatest archaeological finds in modern history. More than a half century after their discovery, scientists are still trying to solve the mystery of who wrote them. With special access to the scrolls, National Geographic goes beyond the enclosed glass case to examine the actual texts up close and explores the caves where they were found. Witness as a new clue to the identity of the scrolls writers is deciphered-a 2,000-year-old cup inscribed with a strange text. Could analysis of this finding unravel the mystery?