Antarctic krill swimming between the Southern Ocean’s surface and seafloor depths, make a “surprisingly small” contribution to the carbon export “highway” compared to their fast-sinking feces, according to research published in Science. Antarctic krill swimming between the Southern Ocean’s surface and seafloor depths, make a “surprisingly small” contribution to the carbon export “highway” compared to their fast-sinking feces, according to research published in Science. Earth Sciences Environment Phys.org – latest science and technology news stories