Sumerians settled in Mesopotamia, an area of modern Iraq known as the cradle of civilization, more than 6,000 years ago, where they invented writing, the wheel, the plough, irrigation, the 24-hour day and the first city-states. Mission co-leaders Licia Romano and Franco D'Agostino of Rome's Sapienza University said Tuesday they discovered one of their ancient ports in Abu Tbeirah, a desert site about 7 kilometers (4.3 miles) south of the town of Nasiriyah. The port's basin, measuring 130 meters (142 yards) in length and 40 meters (44 yards) wide, with a capacity equal to nine Olympics-sized pools, may have also...