Melting Ice in the Arctic

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The Ward Hunt Ice Shelf is what remains of a frozen mass that used to extend across all of Ellesmere Island. The shelf is 130 feet thick and 170 square miles in size. Today, after a massive sheet of ice broke away—the largest on record in the past three years, it's about 10 square miles smaller than it was last week. Professor Jason Box is a researcher at Ohio State University's Byrd Polar Research Center, studying climate and ice interactions in Greenland.