It's not much to look at, but a newly released image beamed back from NASA's Mars rover Curiosity is twice as big in pixel size as the rover's first images. The black-and-white image, beamed to Earth about two hours after the rover's nail-biter of a landing, shows the rocky Martian surface and the horizon in the distance. "Curiosity's landing site is beginning to come into focus," John Grotzinger, project manager of NASA's Mars Science Laboratory mission, said in a statement released by the space agency. "In the image, we are looking to the northwest. What you see on the horizon is the rim of Gale Crater. In the foreground, you can see a gravel field. The question is, where does this gravel come from? It is the first of what will be many scientific questions to come from our new home on Mars." Read more: http://www.huffingtonpost.com/2012/...beams-image_n_1746623.html?utm_hp_ref=science