North Pole could be ice-free this summer, scientists say - CNN.com
Much more detail is available here.
The ice retreated to a record level in September when the Northwest Passage -- the sea route through the Arctic Ocean -- opened up briefly for the first time in recorded history.Except that the Northwest Passage was successfully navigated in years like 1906, 1940, 1941, 1942, 1944, 1957, 1969, 1977, 1984, 1988, and 2000.
Much more detail is available here.
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