NASA's Mars rover has discovered gravel once carried by the waters of an ancient stream that "ran vigorously" through the area, the US space agency said Thursday. Scientists had previously found other evidence of the one-time presence of water on the red planet, but this is the first time stream bed gravel has been discovered.
Mars Rover Finds Evidence Of An Ankle-Deep Stream
Posted on the 29 September 2012 by Gerard @presurferNASA's Mars rover has discovered gravel once carried by the waters of an ancient stream that "ran vigorously" through the area, the US space agency said Thursday. Scientists had previously found other evidence of the one-time presence of water on the red planet, but this is the first time stream bed gravel has been discovered.