Thumbprints on Mars?

 photo credit: JPL/Univ. Arizona HiRISE

        Just a pretty (and enigmatic) picture today, instead of having a go at pseudoscientists. This is a treatment of a HiRISE frame done by Lori Fenton, who studies these things.^{note 1} Please read Lori's blog for an explanation -- it's extremely interesting.

        Question: Why do the pseudo-astronomy people feel the need to invent bullshit artifacts on Mars, when there are genuinely interesting features like these to discuss? Ooops, I couldn't resist having a go after all.

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[1] Lori Fenton is a planetary aeolian geomorphologist. A dune guru, in other words.