Science: Victory on the Lakes

The bitter battle of the Great Lakes has been going on for 40 years, and for 40 years, from Erie to Superior, an ugly, blood-sucking monster has been winning. Chief losers have been the splendid lake trout—even though man himself has been their ally. But now news has come at last that the monsters are being beaten: a subtle chemical, cleverly used, has almost cleared Lake Superior of the invading fish-killing sea lamprey.

In its native ocean the sea lamprey is not particularly numerous, but ever since it appeared in Lake Erie in 1921, having worked its way up the Welland Canal...

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