Beneath the rocky rubble of Utah's high mountain terrain, a billion tons of ice has long been hiding in plain sight — locked inside rock glaciers, hybrid landforms that conventional science struggled to measure. Researchers at the University of Utah have now developed a gravimetric method that reads the subtle language of density and gravity to reveal what radar could not, finding that these overlooked formations hold vast reserves of frozen water across the American West and beyond. As climate change accelerates and traditional glaciers transform, this discovery arrives as both a revelation a