Evidence for Flowing Water on Mars Grows Stronger: Scientific American

http://www.scientificamerican.com/ar...mars-water-rsl

THE WOODLANDS, Tex.—Today's Mars is a frigid desert, a place where water—the key to life as we know it—has gone into hiding. Whatever water may have once existed on Mars in rivers, lakes or even oceans is now frozen into ice caps, locked up in hydrated minerals or buried in debris-coated glaciers.

But last year compelling evidence emerged that when conditions are right, salty brines may persist to this day in liquid form at midlatitude regions on Mars