Evidently I was not the only one to have such suspicions when I saw the image, as I wrote in this post: https://www.facebook.com/pianetamarte2/photos/a.450183055039495.105255.447169305340870/1757417807649340/?type=3&theater
Evidently Prof. Barry DiGregorio of the University of Buckingham also believes that there is something biological about those traces.
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