Evidence of Active Water on Mars

Summer Solstice
A panorama of the martian north-pole during its summer solstice, May 17, 2011. Data collected from the Red Planet suggests that the cap is covered by frozen water and carbon dioxide ice in winter and spring but by the time of the solstice all of the carbon dioxide ice has warmed and evaporated into the planet's atmosphere. Only water ice is left behind, which shows up as bright white areas in this picture.

• Mars hHs New Evidence of Flowing Water