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Let’s “face” it: The Cydonia Face is not pareidolia

            On 2006 September 21, the European Space Agency (ESA) released a color image of the Cydonia Face taken by their Mars Express spacecraft with a resolution of 14 meters per pixel. See (http://www.esa.int/esaCP/SEM09F8LURE_index_0.html). The press release was informative and fair, saying nothing stronger than that “the formal scientific interpretation has never changed: the face remains a figment of human imagination in a heavily eroded surface.”


            Simultaneously, a secondary press release, attributed jointly to ESA and Malin Space Sciences Systems (MSSS), a Jet Propulsion Laboratory (JPL) contractor, began promoting a “composite” image apparently combining ESA and NASA/JPL/MSSS imagery. Those articles contained mockery of the idea that the Cydonia Face might be artificial. Here is a sample: “Wouldn't it be fun if
clouds were turtles? Wouldn't it be fun if the laundry on the bedroom chair was a friendly monster? Wouldn't it be fun if rock mesas on Mars were faces or interplanetary monuments? Clouds, though, are small water droplets, floating on air. Laundry is cotton, wool, or plastic, woven into garments. Famous Martian rock mesas known by names like the Face on Mars appear quite natural when seen more clearly, as the recently-released digital-perspective image shows. (See Figure 1.) Is reality boring?”



            The examples used as ridicule represent the phenomenon called “pareidolia”, the perception of face illusions in natural or noisy settings. But in Figure 1, we must ask where the familiar features from other imagery (e.g., Figure 2) are in this new view, and where those tall bumps on the “forehead” came from. None of the half-dozen previous images showed shadows consistent with these large bumps.


To the first question, the answer seems to be that the viewing angle was altered to that of an observer SW of the Face (a perspective none of the photos had) and looking at it from a low altitude, unable to see over the nose ridge or the forehead. This viewing angle makes it difficult to recognize individual facial features, and also makes the symmetric mesa wall-enclosure less conspicuous. The net effect is a far more natural appearance than in any actual spacecraft image or in any processed images except the 1998 press release from JPL, for which the posted recipe consisted of passing the actual spacecraft image through high-pass and low-pass filters and averaging the two filtered images.


            To the second question about where the bumps came from, all that is certain is that they are not real as depicted. One possibility is that the aspect ratio of the image was adjusted when the viewing angle was changed, because this has the effect of exaggerating vertical relief. Compare, for example, the same image with the horizontal aspect ratio doubled (Figure 3), in which the bumps are must less prominent.



            So why was this rather inaccurate image released at this time? The answer may lie in an examination of the actual spacecraft images, as it did when a similar thing happened back in 1998. First, let’s see what the real spacecraft image taken on this occasion looked like. (See Figure 4.) It shows the same general appearance as we saw and analyzed in the 2001 MGS spacecraft image (http://metaresearch.org/solar%20system/cydonia/2001_Face/Preliminary.asp), except for the addition of color. (See web version of the present printed article to view the new images in color.) That analysis concluded that the east (right on the page) side of the Face might have had excellent bilateral symmetry but for damage apparently done by an impact that left a crater in the SE corner of the mesa. We conjectured that the impact displaced the mouth feature and that a “melt flow” from the crater covered the east cheek area and flowed northward to partially fill the east eye socket.


            Nothing seen in this particular 2006 image adds to or subtracts from that 2001 conjecture. Figure 4 merely shows that the Face has broadly the same color on its surface as the surrounding terrain, which probably indicates that Martian dust storms have coated most objects with a fine layer of orange dust.


However, examination of the color composition of light and dark areas in this image reveals something of possible interest. As is generally true of natural non-reflective terrain, blue has a relatively minor presence in this image, even in shadows (which are predominantly a mixture of red and green). However, the west (left on the page) eye socket feature contains about 50% more blue coloration than other areas of comparable darkness. In light of previous suggestions that colors might be a test of artificiality if they are either appropriate or inappropriate for particular features, it is tempting to wonder if the mesa (assuming artificiality) at one time depicted a Face with blue eyes.


            But as is our habit in researching spacecraft imagery, we sought the original data rather than renderings of it by others. In the course of seeking this data, we discovered that the Face had been imaged in stereo, from which a 3-D anaglyph has been prepared. This may be found at
http://www.esa.int/esaCP/SEM9WG8LURE_index_0.html, and requires a pair of red-green viewing glasses (obtainable at many convenience or variety stores) to view. And it is well worth the nuisance to get them for anyone who wants to see what is really at Cydonia on Mars. It is the closest view yet to what the human eye would see in a direct over-flight of the best known mesa on Mars. And this viewer found it rather astonishing. Here are my research notes upon detailed inspection. Optimally, one should view the anaglyph, read the notes, then view the anaglyph again to match visual details to these descriptions.


Begin research notes: Careful study of the 3-D anaglyph of the Cydonia Face reveals many details impossible to see in any 2-D views, and tells us much about the mesa and the artificiality issue.


            The mesa itself has an amazingly symmetric shape, and is surrounded by a smooth wall of uniform height and slope on all sides. (Previous renderings showed a wall height sharply lower above the Face.) At the top of this wall is a flat platform on which the Face monument rests, rectangular on three sides and rounded at the base. The 3-D shape of the Face monument is symmetric with respect to the mesa boundary. (Only the Carlotto rendering showed this previously.) The monument’s peak height occurs at the lower end of the nose ridge and is about 1 km above the ground or 0.5 km above the platform. This total height is about 2/3 of the width or about half the length of the mesa.


The west eyebrow feature sits on the forehead feature and is “bushy” in appearance. The east eyebrow feature appears broken in two, with the larger piece now slid off the forehead feature into the east eye socket feature. (We had no previous knowledge there was a block in the east eye socket feature before this 3-D view.) The west eye socket feature goes all the way down to platform level and is open on the west side. The west iris feature is not in evidence in this view, perhaps from lower resolution and lack of contrast. The nose ridge feature has a tapered shape toward the forehead and dips in height at the correct location for humanoid noses. Both nostril features seem to be present. The mouth feature also extends all the way down to platform level and is open on the west side. A chin feature is now in evidence.


The east side of the mesa is definitely not collapsed, contrary to some conjectures based on 2-D images. The east side of the platform feature has apparently separated from the mesa wall, perhaps because of the conjectured “damage” (impact?) event. Also, material comprising the east cheek area appears to have dislodged, separated into two contiguous segments, and slipped downward. The segment of maternal immediately to the east of the nose ridge feature has separated from the ridge and shifted slightly northward, partially covering the east eye socket feature. The segment south of that has shifted farther south, with the east-side mouth feature now located where the east-side chin should have been.


The dislodging and sliding of both these segments may have been caused by one or two apparent impact craters seen in southeast corner of the platform. A section of the mesa wall is also open or missing in that corner, perhaps from impact damage. But the presence of some kind of entrance or access-way in that vicinity cannot be ruled out.


If one reverses the 3-D viewing glasses, one can view the Face as a “negative” image, which looks like the hollow insides of a mask facing downward. The eyebrow features and mouth feature are then quite conspicuous. This view shows that the interruption in the center of the mouth feature is apparently caused by the presence of a block, perhaps from the top of the nose ridge, that has fallen into the mouth feature. The slide material on the east side is seen to have a very steep slope. A formation made from natural rock would tend to fracture and pile up, decreasing the slope. So this increased slope suggests a light-weight artificial material that remained intact when it cracked and separated from the nose ridge on the east side.
End research notes


            The conclusion of this examination of the anaglyph view of the Cydonia Face is that it is now much easier to see why the 2-D views lacked some bilateral symmetry, because some sort of damage event (probably an impact) has dislodged and mildly displaced some material on the east side of the mesa. The basic symmetry of the Face can now be seen as not just bilateral, but symmetric and face-like in the third dimension too.


For the first time, we can now see that all the pieces are there. The original Viking spacecraft view in 1976 showed us just the impression of an eye socket, a nose, and half of a mouth on a fairly regular mesa. We now see that the famous Face has two eye sockets topped by eyebrow features and probably a blue iris in at least one of them; a nose with nostrils, tapered and indented toward the forehead; a continuous mouth with parted lips; a chin feature; and a uniformly symmetric mesa wall of even height to a flat top on which the Face is mounted. Allowing for some minor displacements from erosion or a damage event, all these features potentially have the correct size, shape, location, and orientation to be a deliberate portrayal of a humanoid face. And the mesa and its surroundings provide no background of features from which we could pick and choose those fitting our preconception of a face.


As we have reported in previous issues, there are other artistic images on Mars too. Are these real or illusions? I personally think that, if the best of these turned up on Earth, no one would question that they were of human origin (as is the case for the animal images at Nazca, Peru). And I subscribe to Steven Goldberg’s dictum, “The consequences of a claim that something is true are entirely irrelevant to the issue of whether the claim is true.” But in evaluating these images on Mars, we can’t help thinking about the enormous consequences if they are real, and allowing those to color our judgments about the images. However, we need to recognize that as a form of bias and as bad science, even if it is prototypically human behavior.


The Cydonia Face mesa is unquestionably artificial. Special interests determined to make that conclusion seem implausible are doomed to fail in the long run, but are apparently attempting to buy themselves more time and to preserve the justifications for future Mars exploration missions already approved, before the news of discovery of an artifact on Mars has a chance to get to the public from authoritative sources.


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