Submerged city may be older than Mesopotamia Utpal Parashar Dehra Dun, December 3 A submerged coastal city near Poompuhar in Nagapattinam, Tamil Nadu, is the focus of a major expedition being conducted jointly by the Indian Naval Hydrographic Department (INHD) and the Archaeological Survey of India (ASI). Both the organisations are trying to piece together the city's past, which some noted marine archaeologists consider to be the birthplace of modern civilisation. The once flourishing port city is located about one mile off the Nagapattinam coast. "We have been able to locate a section of the city at a depth of...