Lake Vida Expedition Image 2
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Lake Vida Expedition (Image 2)

July 3, 2012
A helicopter hovers over top a mountain tent camp used by researchers during the 2010 Lake Vida expedition. Bull Pass can be seen in the background. The purpose of the expedition was to access the isolated and ice-bound brine ecosystem and underlying sediments in this unusual, mostly frozen lake--one of the highest and coldest of the McMurdo Dry Valleys in Antarctica. The expedition focused on understanding the nature of this enigmatic, cryogenic system that supports a living microbial community at very low temperatures (minus 13 degrees Celsius; 7 degrees Fahrenheit) and in a highly concentrated brine (seven times the salinity of seawater). This research has implications for other isolated systems including subglacial lakes, icy planets and moons in the solar system. This research was supported by National Science Foundation grants ANT 07-39681 and ANT 07-39698 under the American Recovery and Reinvestment Act of 2009. Alison Murray, a molecular ecologist with the Desert Research Institute in Reno, Nev., was principal investigator. Credit: Hilary Dugan, University of Illinois, Chicago

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