emNo mystery remains in the vast ice sheet that covers Antarctica; advanced satellite radar has constructed a detailed three‑dimensional map of the terrain lying thousands of meters below the frozen surface. The data, derived from airborne and space‑borne missions that measure subtle variations in surface elevation and ice flow, reveal a complex network of valleys, ridges, and sedimentary basins hidden beneath the ice. The precision of the new map allows scientists to identify structural features that influence how the ice sheet moves in response to environmental forces. _2_ The implications of these finer‑scale observations extend to global climate projections. By incorporating the detailed subglacial topography into ice‑sheet models, researchers can better simulate how the ice sheet will respond to warming ocean temperatures and increased precipitation. Accurate predictions of ice‑sheet stability are essential for estimating future sea‑level rise, and the new map offers a clearer picture of potential zones of rapid thaw or accelerated flow that were previously assumed to be uniform. _3_ Outreach to the scientific community and policymakers centers on collaborating with international teams to continue refining mapping techniques and integrating data sets from additional missions. Long‑term, the goal is to produce a comprehensive database that tracks changes over decades, providing a robust foundation for monitoring and forecasting the Antarctic ice sheet’s behavior under various climate scenarios.