Does the South Martian Pole Have A Buried Lake?

“Our computer model results and the radar data make it much more likely that at least one area of subglacial liquid water exists on Mars today, and that Mars must still be geothermally active in order to keep the water liquid beneath the South Pole ice cap.” 

— Professor Neil Arnold, Ph.D., Interim Director, Scott Polar Research Institute, Cambridge University, U.K.