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Nasa put together 17 individual post of photographs to show us the one we have on screen. what does it tell you, tom? what questions does it raise? >> it is a wonder rouse panorama, join. much on student has been on the eight years after landing in 2004. it is embarking on another two year traverse across the crater looking for inhabitable climates in the marss history, looking for water-baring rocks in particular. this image strikes our imagination. it inspires us to want to put human explorers...