Scientists found 3,507 unique gene sequences in ice drilled from Lake Vostok, the world's largest subglacial lake.
Josh Landis/ National Science Foundation
Beneath some 13,000 feet of Antarctic ice is a world that should be lonely and empty. But, if a new study is correct, this subglacial lake could be teeming with hardy bacteria buried in one of the world’s most unusual environments.
Scientists from Bowling Green State University have recovered more than 3,000 gene sequences – some from complex organisms – from the ice of Lake Vostok, the world’s largest known subglacial lake. If the samples are found not to have been contaminated, the findings could be revolutionary, altering our understanding of life not only on our own planet but on alien worlds.
Lake Vostok lost contact with the atmosphere some 15 million years ago, and is not thought to be a homey place. The coldest natural temperature ever recorded on Earth – minus 126.6 degrees Fahrenheit – was taken on a mountain near the lake. Below the ice, the water is frigid, except around probable hydrothermal vents that bring it to a boil. The weight of the ice pressurizes the water to a lethal 350 atmospheres at the top of the lake, and even more so down below. The lake is completely dark, with few vital nutrients seeping down to its depths.
But scientists have for years suspected that there could be life there. Astrobiologists – scientists who search for alien life – have suggested that organisms plumbed from those extreme conditions could offer models for what we might find on planets, where similarly unforgiving environments might beg of their inhabitants highly adaptive survival mechanisms that look nothing like the biological processes we know.
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