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MICROBES IN MANY COLORS—Scientists have found a multitude of deep-sea microorganisms using a variety of chemical compounds to live. Yellow bacterial mats atop sediments in the Guaymas Basin in the Sea of California (top) are evidence of microbes that oxidize sulfide; the sediments underneath harbor methane-oxidizing archaea. The orange mats (above) are made by microbes that live off iron in seafloor rocks off Hawaii. (Top photo courtesy of Katrina Edwards, WHOI. Bottom photo by Terry Kirby, University of Hawaii) (Bottom photo by Terry Kirby, University of Hawaii)[back]
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