New York Times: Last month, on its next-to-last day of a 15-day Antarctic tour, the Ocean Nova, carrying 65 passengers and a crew of 41, ran aground in Antarctica and was stalled for more than a day. Damage was minor (some flaking paint and dents to the hull), and all passengers on the cruise, run by Connecticut-based Quark Expeditions, were safely transferred to another ship. But the incident, the fourth maritime accident in three years involving excursion vessels in Antarctica, is raising concerns about …