"in 2007, the northern hemisphere reached a record low in ice coverage and the northwest passage was opened.
"in 2007, the northern hemisphere reached a record low in ice coverage and the northwest passage was opened.
northwest passage:356
on september 14, 2007, the european space agency stated that ice loss that year had opened up the historically impassable passage, setting a new low of ice cover as seen in satellite measurements which went back to 1978.