Scientists measured the ice thickness at Schiaparelli Glacier in Tierra del Fuego, Chile, for the first time using ground-penetrating radar. They found that the glacier has a maximum ice thickness of 324 meters in a valley-shaped bedrock. The bedrock is below sea level for over half of the measurements, reaching a minimum of -158 meters. This shows that the local topography has been significantly shaped by the glacier. These measurements help us understand how glaciers change over time and how they are affected by climate variability and change.