Divers investigating a shipwrecked brig once owned by Lord Elgin have discovered an overlooked piece of marble from the Acropolis in Athens. A marble fragment from the Acropolis of Athens has been found in the remains of a ship that sank in 1802, according to Greece's Ministry of Culture. The ship is the Mentor, a brig that went down southeast of the island of Kythira (also spelled Cyther... [2525 chars]