article_snippet: Pictured is the IceMole poised for action .
article_snippet: It looks like a rectangular metal box with a copper head and ice screw that can melt through ice, . '
article_snippet: It can drive curved trajectories through bulk ice.
article_snippet: To help the probe navigate, scientists sent acoustic pulses from the surface into bulk ice.
article_snippet: This is similar to a GPS but uses different kinds of waves that use sound to track the position of the IceMole.