On August 4, 2011, NASA released a series of images illustrating possible evidence of liquid water active on Mars today. This combination image, showing the planet's Newton crater, was made with 3-D modeling. The evidence lay in the dark markings on the slope, said to be a few feet to five yards in width.
Another location on the planet surface shows signs of water activity.
The Mars Reconnaissance Orbiter show the water activity repeating itself over a three year period.
The images suggest that the water activity increases during warm seasons and fades in cold seasons.
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.
Martian Channels
A series of markings ranging from 1 meter to 10 meters (approximately 3 feet to 33 feet) reminiscent of water flow appear on a scarp in the Hellas impact basin.
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