Is there life on Europa, a frigid icy moon of Jupiter? Discover asked that question nearly 13 years ago -and looked to the sea ice in Barrow, Alaska, for an answer ("Like Alaska, like Europa," May 2002). Glaciologist Hajo Eicken and his team were studying the survival strategies of microorganisms in Europa-like environments. They found that microbes thrive, even in the depths of winter, in a briny liquid beneath the ice. The microbes most likely feed on sediments and on long chains of sugars they produce called extracellular polymeric substances. It wasn't a definite yes to life on Europa, but it was a strong maybe.
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