Word: taimyr
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Dates: during 1960-1969
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...fight against a common enemy: permafrost, the iron-hard layer of dirt and rock bonded together by year-round ice. Permafrost underlies 20% of the earth's land area. It is 150 ft. thick at Fair banks, Alaska, more than 2,000 ft. thick beneath the Taimyr Peninsula in Russia. Permafrost blocks well shafts, freezes oil drills, makes water piping and sewage disposal costly, heaves up 5-ft. hummocks in airport runways. Thawed, it only gets worse. Heated buildings tilt on their softened foundations. Blacktop highways often absorb enough heat to melt their way downhill...
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