Mars would present conditions near the triple point of water. Under the surface, sealed from the partial vacuum they laughingly call an atmosphere, ice would be present and would sublimate off only where the ice were exposed by erosion of the surface. They are searching for geysers and hot springs using remote sensing from orbit right now.
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Under the surface, sealed from the partial vacuum they laughingly call an atmosphere, ice would be present and would sublimate off only where the ice were exposed by erosion of the surface."Subsurface water is a possibility, but that doesn't lend much credence to all that raging, copious flow of water that the NASA types are proposing.
After all, remember "polywater?" It was found in the tiny interstitial faults in the quartz moonrocks. Water like that may be found on Mars, but it will most likely be of many orders of magnitude less in quantity than the raging torrents imagined by these guys from NASA.