"The Thing": A 140,000-Year-Old Organism Discovered in Antarctica's Ice-Shrouded Lake Vostok
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April 21, 2011

"The Thing": A 140,000-Year-Old Organism Discovered in Antarctica's Ice-Shrouded Lake Vostok

Ancient_bacteria

An ancient living laboratory of our planet's past in Antarctica may have provided a preview of what we can expect to find deep below the barren surface of Mars and in the ice-shrouded seas of Jupiter's Europa. Two of the world's leading experts on life at the lower temperature extremes, Buford Price of the University of California, Berkeley and Todd Sowers of Penn State observed that microbes colonizing life appear to have two levels of metabolism: a survival metabolism in which they remain alive but become dormant until exposed to nutrients or higher temperatures, or, a maintenance metabolism for steady sustained growth.

The team observed that some organisms in permafrost appear to have "protein repair enzymes that maintain active recycling of certain amino acids needed for cell repair for at least 30,000 years." They added that the "extremely low expenditures of survival energy enable microbial communities in extreme environments to survive indefinitely."

In the Antarctic's ancient ice-bound Lake Vostok they reported that nitrifying bacteria with low but active metabolisms have been found encased in liquid veins at minus 40 degrees F for more than 140,000 years. And, it takes about 108 years for carbon to turn over in the cells.

Lake_vostok_nsf_h-300x189 They projected from their conclusions that life moving so slowly that it appears to be frozen, dormant, or undectable may survive in the cold, icy and "cosmically radioactive conditions of outer space."

Applying the Lake Vsotok microbe discoveries to the possibilities of finding life on Mars or Europa, they concluded that "Our results disprove the view that the lowest temperature at which life is possible is minus 17 degrees C in an aqueous environment."

Europa_Orbiter_medium2 Their data showed no evidence of a threshold in metabolic rate at temperatures down to minus 40 degrees C. Due to the structured water in its cytoplasm, a cell resists freezing and ionic impurities prevent freezing of veins in ice and permit transport of nutrients to, and products from, microbes.

Lake Vostok, believed to harbor ancient life that has been isolated from open exchange with the atmosphere for several million years, is the largest subglacial lake on Earth, discovered in 1996 by Russian and British scientists underneath the Russian station Vostok in Antarctica -- one of 140 subglacial lakes located beneath the Antarctic ice-sheet. At 250km long and 50km wide, some 4000 meters underneath the surface ice, and could be one of the most important scientific finds of the last several decades.

No other natural lake environment on Earth has this much oxygen as Lake Vostok -- an oligotrophic extreme environment, one that is supersaturated with oxygen, with oxygen levels 50 times higher than those typically found in ordinary freshwater lakes. The sheer weight of the continental icecap sitting on top of Lake Vostok is believed to contribute to the high oxygen concentration. Microbial organisms in Lake Vostok must be capable of overcoming very high oxygen stress, and may have had to evolve special adaptations, such as high concentrations of protective enzymes, in order to survive.

The Daily Galaxy via Buford and Price: Temperature dependence of metabolic rates for microbial growth, maintenance, and survival

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Comments

OK, this really does make a lot of sense dude. WOw.

www.complete-privacy.au.tc

This's just amazingly awesome! does that mean they're the longest living organisms known?

...that explains the new finds? I'm not sure why this article could not provide a bit of background.

Interesting post

Great Discovery and a nice post, however some back ground would have been more helpful.

I'll believe it when I see it from an official source. The Daily Galaxy does not have the reputation for vetting sources or necessarily reporting facts rather than fiction if it makes a good headline.

People have been making similar claims, along with a lot of far-fetched storytelling, since the Russians started drilling several years ago.

Last I heard they had to halt drilling for the season before breaking through to the lake and wouldn't have any samples until they resume next year.

There is no such temperature as "minus" anything. "Minus" is a binary operator - you need two operands, e.g. 4 minus 1 equals 3. "Negative" is a unary operator. Temperatures below 0 are referred to properly as "negative", not "minus".

The messed up thing about this is that Russian scientists poured kerosene down the hole to keep it from freezing

http://dailybayonet.com/?p=8103

Amazing, this is great discovery.

People have been making similar claims, along with a lot of far-fetched storytelling, since the Russians started drilling several years ago.

I believe that if humans continue to explore areas that they have never been like this and other planets (and moons), that there is a very real possiblity that they may come to regret it someday. Like they say, curiosity killed the cat..just sayin.


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