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Enrichments for anaerobic, organotrophic hyperthermophiles were performed with hydrothermal chimney samples collected from the Mid-Atlantic Ridge at a depth of 3,550m (2322N, 4457W) and the Guaymas Basin (2701N, 11124W) at a depth of 2,616m. Positive enrichments were submitted to -irradiation at doses of 20 and 30kGy. Two hyperthermophilic, anaerobic, sulfur-metabolizing archaea were isolated. Strain...
Subsurface microbial communities supported by geologically and abiologically derived hydrogen and carbon dioxide from the Earths interior are of great interest, not only with regard to the nature of primitive life on Earth, but as potential analogs for extraterrestrial life. Here, for the first time, we present geochemical and microbiological evidence pointing to the existence of hyperthermophilic...
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