Christian Science Monitor: Mariners have dreamed for centuries of finding a commercially viable shortcut between Europe and Asia across the top of the world. Many have died trying, but none succeeded until late September, when two German freighters slipped quietly into Rotterdam Harbor after completing a historic month-long journey from Vladivostok, in Russia’s Pacific far east, through the once-impassable Arctic route. The Bremen-based company that operates the two specially reinforced cargo ships, the Beluga …