A titanium ring deployed at a Pacific hydrothermal vent site indicates the presence of bacteria thriving beneath the seafloor. Within days, Arcobacter bacteria, discharging from the subsurface, rapidly colonize the ring, producing a white sulfur filament mat up to 3 centimeters thick as they grow. (Craig Taylor and
Carl Wirsen, WHOI and Françoise Gaill, Université Pierre
et Marie Curie, Paris, France.)[back]
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