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About This Cover

Cover photograph (Copyright © 2007, American Society for Microbiology. All Rights Reserved.): Photograph of Laguna Azul, a pristine and inaccessible wetland located at 4,560 m above sea level in the Andes Mountains of Argentina. Acinetobacter johnsonii bacteria isolated from this environment showed a high level of UV-B resistance and an ability to efficiently repair damaged DNA. Photo by María Eugenia Farías, PROIMICONICET, Tucumán, Argentina. (See related article in the December issue: volume 72, page 7857.)