Features called recurring slope lineae on Mars, which tend to appear in warmer weather, appear consistent with water flow. (seeker.com)
Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water. (sciencenews.org)
But areas that may contain near - surface water or ice, such as the recurring slope lineae where watery brines may periodically run down steep hills, are designated as «special regions» that require more care and would be currently off limits to spacecraft without further sterilization. (sciencemag.org)