The expedition was carried out in regions of drifting ice in West Antarctica in 2022. On the return visit in 2024, Ran disappeared without a trace under the ice. Credit: Filip Stedt Using the unmanned submarine Ran, researchers mapped the underside of West Antarctica’s Dotson Ice Shelf, uncovering complex ice formations and significant melt areas driven by underwater currents, crucial for enhancing sea level rise predictions. An international research team from the University of Gothenburg deployed the unmanned submarine ‘Ran’ beneath the thick ice of Antarctica. They received the first-ever detailed maps of the underside of a glacier, providing valuable...