Mars also has some very tall mountains on Mars. The tallest volcanic
mountain towers 15 miles above the plain. There may still be some geothermal activity going on. Geothermal activity would be a great source of heat that could be used to extract
water from the frozen ground
The sand and rocks on the surface of Mars appear to contain a lot of carbon compounds that are needed to sustain life. Some believe that Mars may have
supported primitive life in its early history. Theoretically, life may still exist if Mars does, in fact, have underground oceans of water heated by geothermal action.