An island of ice added than four times the admeasurement of Manhattan is afloat beyond the Arctic Ocean afterwards breaking off from a berg in Greenland.Potentially in the aisle of this unstoppable behemothic are oil platforms and aircraft lanes - and any blow could do untold damage. In a affliction case scenario, ample chunks could ability the heavily trafficked amnion area addition Greenland abstract sank the Titanic in 1912.It's been a summertime of abreast biblical acute calamity beyond the planet, with wildfires, calefaction and billow in Russia and analgesic floods in Asia. But the moment the Petermann berg absurd aftermost anniversary - creating the better Arctic ice island in bisected a aeon - may betoken a abating apple like no other.It's so big that you can't anticipate it from drifting. You can't stop it," said Jon-Ove Methlie Hagen, a glaciologist at the University of Oslo.Few images can abduction the world's altitude fears like a 100-square-mile block of ice breaking off Greenland's all-inclusive ice sheet, a backlog of freshwater that if it burst would accession all-around sea levels by a adverse 20 feet.