Strong proof that there's water on Mars as Curiosity rover discovers rounded off pebbles

Daily Mail: 'Scientists exploring Mars have discovered that water once flowed in streams several feet deep, fuelling speculation that the planet could have once supported life. The news, which has left top NASA scientists 'excited', comes thanks to photographs of bedrock beamed back from the red planet by the Curiosity rover. There have been previous signs that water existed on Mars long ago, but the images released on Thursday showing pebbles rounded off, probably by water, offered the most convincing
evidence so far of an ancient streambed which could have been waist-deep.There was 'a vigorous flow on the surface of Mars,' said chief scientist John Grotzinger of the California Institute of Technology. 'We're really excited about this.' The discovery did not come as a complete surprise. NASA decided to land Curiosity inside a spot near the Martian equator, Gale Crater, because photos from space hinted that the spot possessed a watery past. What has surprised scientists are the mild temperatures recorded by the weather station on board Curiosity. On more than half the days Curiosity has been exploring Mars, the daytime temperature has been above 0°C, according to the Remote Environment Monitoring Station (REMS)...read more>>>...