Water flows on mars in the warm season

Image from NASA,

These newly released images from the Mars Reconnaissance Orbiter, displays the same spot in different seasons.  During the warm months you can see the dark tendrils flowing downhill(right to left) in 1/2 to 5 yard wide ribbons.  Researchers say that the water is most likely as salty as the earth's oceans.  Purer water would not melt at these low temperatures.  Where there is water, I'd bet there is life.  Click on the image at the NASA site and you can see the dark tendrils grow in the summer and then disappear in the winter.
The full story at the NASA website