AP AP-Tech/Science NewsThe estimated reading time is less than a minute Huge ice island could pose threat to oil, shipping News Sources August 10, 2010 at 5:55 pm0 By KARL RITTER 2010-08-10T21:55:08Z STOCKHOLM (AP) — 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…. Leave a comment