InTheNews.co.uk: A chunk of ice more than seven square miles has broken off an ice shelf in the Canadian Arctic, according to scientists. The ice broke free from the Ward Hunt ice shelf, a small area off the larger Ellesmere Island. Scientists have warned that further splitting could occur later this year. Derek Mueller, a researcher at Trent University, told the Associated Press that global warming is not necessarily to blame and said the event was consistent with the theory that the …