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New microbe species discovered.(Some things new under the sea)(Brief article)

In the quest to explore the remarkable diversity of microbial life on Earth, a German-American team of scientists has discovered seafloor bacteria (right) that can "eat" natural gases such as ethane, propane, and butane--and in a previously unknown way: without oxygen. The bacteria use sulfate instead of oxygen to metabolize natural gases into energy and organic matter, said WHOI biologist Stefan Sievert, co-author of a study published Oct. 18, 2007, in the journal Nature. The bacteria may have played a role in the evolution of life on early Earth, when oxygen was sparse in the ...

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