CHARLESTON, S.C. (Reuters) - Scientists who opened a pocketwatch from the Civil War submarine Hunley found a cloudy crystal and corroded hands but the information within the ornate timepiece will take them closer to solving riddles about the hand-cranked sub, researchers said this week. The scientists said the position of the hands on the gold watch allowed them to narrow the time frame for when it stopped. The new information may give scholars an answer to the question of how long the Hunley survived after she torpedoed the USS Housatonic at about 8:45 p.m. on Feb. 17, 1864, researchers said...