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While most people are familiar with microbes that occur above ground—such as this orange-colored colony surrounding Grand Prismatic Spring at Yellowstone National Park—microbes also occur around hydrothermal vents on the ocean floor, at depths where light cannot penetrate and where they trap carbon using chemical energy instead of sunlight. Photo by Jim Peaco, National Park Service, via Wikimedia Commons.

While most people are familiar with microbes that occur above ground—such as this orange-colored colony surrounding Grand Prismatic Spring at Yellowstone National Park—microbes also occur around hydrothermal vents on the ocean floor, at depths where light cannot penetrate and where they trap carbon using chemical energy instead of sunlight. Photo by Jim Peaco, National Park Service, via Wikimedia Commons.

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