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Breathing Without Oxygen (1 of 5)

Caption: Group at work at Mono Lake, Calif. This image relates to an article that appeared in the Aug. 15, 2008, issue of Science, published by AAAS. The study, by Dr. Thomas Kulp and colleagues at US Geological Survey in Menlo Park, Calif., was titled "Arsenic(III) Fuels Anoxygenic Photosynthesis in Hot Spring Biofilms from Mono Lake, California."

Credit: Image courtesy of Laurence G. Miller and Shaun Baesman

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