July 30, 2008 View all news BBC NewsA large chunk of an Arctic ice shelf has broken free of the northern Canadian coast, scientists say.Nearly 20 sq km (eight sq miles) of ice from the Ward Hunt shelf has split away from Ellesmere Island, according to satellite pictures.It is thought to be the biggest piece of ice shed in the region since 60 sq km of the nearby Ayles ice shelf broke away in 2005.Scientists say further splitting could occur during the Arctic summer meltRead full storyRead about what Friends of the Earth is up to Categorised in: Climate Change