(Later searching located this link.  I am not the first to see this pattern on the rock.)

   Here is a very good color composite image of the rock "Yogi".  I immediately saw the strange markings on the underside and the lower right.

   Magnification shows them in far greater detail, but still leaves a bit to be desired.  I used blur and anti-shadow to extract the patterns from a black and white image and put together the following image.

   For a super resolution color view of Yogi, click here.

   There are also many pockmarks and openings of the same approximate size.  This is at least dependent on the long-term presence of water to create this sort of erosion.  At the very least, large quantities of water had to surround this rock for thousands of years to get this sort of weathering effect.

   But then it raises the question- if water in that quantity was present for that period of time, was life also present?

   The fossils in Eagle Crater answer that clearly enough, and the same fossils have been found (but not yet resolved sufficiently by NASA) in Gusev.  Pathfinder seems to have found traces of life years earlier than either of the MER craft.

   To help resolve the details and perhaps answer a few questions, I converted this image to monochrome and then performed contrast and differential processing.  It was hoped that this would provide a clearer view of the convolutions.

   If this is weathering, then it is most unusual indeed.  The features are so compelling and clear that I would accept this easily as proof that Pathfinder and Sojourner had found fossils on Mars back in 1997.

   So why is this not accepted even today?  I am becoming rather skeptical of the ability of large organizations to make rational decisions even when faced with such clear evidence.

   Why is it that the evidence of the Martian meteorite ALH-84001 is discredited and ignored, when the markers are clear enough?  Why is this image not taken as serious evidence of fossils on Mars?

   I can understand the reluctance to accept the results of the Viking experiments that were performed by Gil Levin, searching for microbes.  There was activity but they felt they had a plausible chemical explanation.  But in light of these findings, I am forced to conclude that Levin was right back in 1976.  Viking did indeed find living bacteria.