Listen to learn how scientists reanalyzed remotely sensed data taken in the late 1970s to study the oil spill. Dr. Chuanmin Hu and his graduate student Shaojie Sun use the Landsat and Coastal Zone Color Scanner (CZCS) data to develop "treasure maps" of oil from the IXTOC-1 spill to steer field studies. Listen in to find out how they did it.