"An island of ice more than four times the size of Manhattan is drifting across the Arctic Ocean after breaking off from a glacier in Greenland.
Potentially in the path of this unstoppable giant are oil platforms and shipping lanes - and any collision could do untold damage. In a worst case scenario, large chunks could reach the heavily trafficked waters where another Greenland iceberg sank the Titanic in 1912.
It's been a summer of near biblical climatic havoc across the planet, with wildfires, heat and smog in Russia and killer floods in Asia. But the moment the Petermann glacier cracked last week - creating the biggest Arctic ice island in half a century - may symbolize a warming world like no other."
Rob Gillies reports for the Associated Press August 11, 2010.