Rising temperatures are threatening livelihoods of indigenous hunters and thinning sea ice vital to wildlife. AFP
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An expanse of ice roughly the size of Delaware is close to breaking off from the warming Antarctic ice shelf to form one of the world's largest-ever icebergs, scientists said Thursday.The rift, which is threatening to carve off a finger-shaped iceberg about 350 meters thick, expanded by 17 kilometers (11 miles) in six days, leaving just a 13-kilometer thread attaching it to the main ice sheet.An ice shelf is a floating extension of a land-covering ice sheet.Larsen C is the most northerly of the Antarctic ice shelves, as well as the largest. Seven years later, the Larsen B shelf followed -- at 3,250 square kilometers, it was the size of Rhode Island.
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