In the caption below this exquisite close-up shot of the Martian surface, a number of features are explained. But, unless I missing something, and I probably am, what is the ribbon-like structure running from the bottom right towards the upper left? And, what are the groups of short dark parallel lines that appear here and there on the ‘ribbon’ (they actually look very much like bar codes)? Are they just a more regular pattern of “dust devils” to use the term that Phil, the Bad Astronomer, mentions in the caption? Even if they are, I’m still not sure what the ‘ribbon’ is. Can you enlighten me.