Iceberg three time the size hanging on by just 12 kilometre stretch.AN iceberg three times on the verge of breaking off. Just 20 kilometres of the mass now connects to the main body.Scientists at the Argentine Antarctic Institute (IAA) flew over the area, known as the Larsen C ice shelf, to monitor its evolution.Shocked experts found “about 20 kilometres of crack left so that the mass of ice is completely fractured and falls off into the sea”,