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Tickled by sunlight, life teems at the ocean surface. Yet the influence of any given microbe, plankton, or fish there extends far beyond this upper layer. In the form of dead organisms or poop, organic matter rains thousands of feet down onto the seafloor, nourishing ecosystems, influencing delicate ocean chemistry, and sequestering carbon in the deep sea. But humanity’s taste for fish may have disrupted some of that cycling, according to new research published today...
