HAVANA — The remains of what may be a 6000-year-old city immersed in deep waters off the west coast of Cuba was discovered by a team of Canadian and Cuban researchers. Offshore engineer Paulina Zelitsky and her husband, Paul Weinzweig and her son Ernesto Tapanes used sophisticated sonar and video videotape devices to find “some kind of megaliths you ‘d find on Stonehenge or Easter Island,” Weinzweig said. “Some structures within the complex may be as long as 400 meters wide and as high as 40 meters,” he said. “Some are sitting on top of each other. They show very distinct shapes and symmetrical designs of a non-natural kind. We’ve shown them to scientists in Cuba, the U.S., and elsewhere, and nobody has suggested they are natural.”