In the lightless depths two kilometers beneath the Antarctic surface, a creature long defined by its world of cold and sunlight has been found where it was never expected to be. Antarctic krill — the small, abundant crustaceans that anchor the Southern Ocean's food web — have been observed at deep-sea hydrothermal vents, apparently reproducing in conditions of extreme heat, toxic chemistry, and crushing pressure. Documented by National Geographic Explorers and published in Communications Biology, the discovery does not merely expand a map; it asks whether the boundaries scientists have drawn a