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 Scientists close to entering Vostok

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PostSubject: Scientists close to entering Vostok   Wed Feb 01, 2012 9:06 pm

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

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.

“This is a huge moment for science and exploration, breaking through to this enormous lake that we didn’t even know existed until the 1990s,” said John Priscu, a researcher at Montana State University who has long been involved in antarctic research, including a study of Vostok ice cores.

Read the Story Here By Marc Kaufman, Published: January 31, 2012

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