Telegraph: In a worst case scenario, large chunks could reach the heavily trafficked waters where another Greenland iceberg sank the Titanic in 1912. The ice shelf is drifting across the Arctic Ocean after breaking off from a glacier in Greenland. “It’s so big that you can’t prevent it from drifting. You can’t stop it,” said Jon-Ove Methlie Hagen, a glaciologist at the University of Oslo. Researchers are trying to plot the trajectory of the floating ice shelf, which is moving …