Antarctic researchers have succeeded in mapping a mountain range that is as tall and impressive as the Alps and yet invisible to the naked eye, since the entire range is hidden beneath miles of ice. The international expedition (which 80beats covered when it set off in October) used radar, gravity sensors, and other instruments mounted on airplanes to chart the contours of the mighty Gamburtsev mountains, but say the results mostly revealed new mysteries. For example, researchers expected to see a plateau formation, indicating that the peaks had been worn down over millennia. Instead, says researcher Robin Bell: