At the frozen tip of South America, where the mountains of Tierra del Fuego meet the jagged currents of the Beagle Channel, a dedicated team of scientists and explorers is diving into one of the planet’s last truly intact marine refuges. While the rest of the world’s underwater forests vanish at an alarming rate, these resilient subantarctic kelp systems offer a rare blueprint for how we might still protect the life-sustaining pulse of our oceans.