Glacier-dwelling bacteria thrive on chemical energy derived from rocks and water ...Middle East

Portage Glacier (right), Burns Glacier (center), and Shakespeare Glacier (left) in Southcentral Alaska, seen from the air. (USGS, Alaska Science Center/)In the darkness beneath glaciers, which range in thickness from less than a quarter mile to a full mile deep (or more), microbes cannot depend on sunlight for energy. Instead, many of these hardy organisms rely on rocks and water to survive, scientists reported on December 21 in the journal Proceedings of the National Academy of Sciences. When meltwater reacts with minerals eroded by the glaciers, it produces hydrogen gas that microbes can use to generate chemical energy. Researchers found that microbes collected from Icelandic glacial strea

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