Science: Ice

If you are one of the thousands of armchair adventurers to whom the spell of the Arctic has been only a dream . . . this summer you can follow trails traveled before only by explorers. . . . Adventure, yet perfect safety!

Thus advertised the Alaska Line this summer, believing that many a tourist would like to see what few tourists have seen—the grinding, gleaming polar ice pack, which squeezes ships to death in winter, retreats north of the Arctic Circle in summer. For...

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