Science: Ears Under Water

At last week's end German submarines had sunk some 175,000 tons of Allied and neutral shipping, plus a British airplane carrier. The carrier was a fine trophy, but the total haul of merchantmen, for the first full month of World War II, was skimpy compared to the big bags of 1917, when the Kaiser's U-boats were sinking five, six, seven, eight hundred thousand tons of shipping a month. Tactically and technologically, Germany's opponents today know much more about fighting submarines than they did in 1917.

In the last war anti-submarine warfare started from scratch....

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