Scientists close to entering Vostok, Antarctica’s biggest subglacial lake

Source: The Washington Post , February 1 2012.

After drilling for two decades through more than two miles of antarctic ice, Russian scientists are on the verge of entering a vast, dark lake that hasn’t been touched by light for more than 20 million years.

Scientists are enormously excited about what life-forms might be found there but are equally worried about contaminating the lake with drilling fluids and bacteria, and the potentially explosive “de-gassing” of a body of water that has especially high concentrations of oxygen and nitrogen.

To prevent a sudden release of gas, the Russian team will not push the drill far into the lake but just deep enough for a limited amount of water — or the slushy ice on the lake’s surface — to flow up the borehole, where it will then freeze. 

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