NASA finds "strong" evidence for liquid water on Mars

U.S. space agency NASA announced on Monday it has found "strong" evidence that there is liquid water intermittently flowing on present-day Mars.

Images taken from the Mars orbit showed dark, finger-like markings that, typically less than five meters in width, appear on slopes during warm seasons, lengthen and then fade during cooler seasons on the Red Planet .... http://news.xinhuanet.com