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Beggiatoa is a colorless sulfur bacterium which occurs as filaments of various widths. It oxidizes hydrogen sulfide, producing elemental sulfur that is deposited within the bacterial cell as sulfur granules and give this filament its opaque appearance. This picture was taken by David Patterson, Linda Amaral Zettler and Virginia Edgcomb; provided courtesy of the microscope website.

• Hardy Microbe Thrives at pH 0 (more info) . This article reports that a team of geomicrobiologists has detected a new microbe, called Ferroplasma acidarmanus, surviving in some of the most acidic waters on Earth..._{(more info)}
• Life in Extreme Environments: The Universe May Be More Habitable Than We Thought, Part 2 (more info) . This article explores microbial life in extreme environments associated with salinity, acidity, alkalinity, high temperature, low temperature, radiation..._{(more info)}
• MBL Research in the Rio Tinto (more info) . This web site describes ongoing research of the Marine Biological Laboratory's Astrobiology Group at the Rio Tinto, Spain. The resource includes an image-rich..._{(more info)}

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