Cydonia-Avebury: A Mars/Earth Connection 1995

by David S Percy

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The stunning terrain correspondences between Avebury, the World Heritage site in Wiltshire UK, and the Cydonia complex on Mars. How this discovery was originally made in 1991 is recorded here in the first part of the Two-Thirds Preface.

Surface Features

An increasing number of people are becoming aware of the 'Face' on Mars. In August 1975 NASA launched the Viking space probe to the red planet. During July 1976 the Viking orbiter began sending back detailed pictures of the planet's surface.

The Face on Mars

Figure 1. The Face on Mars (Viking image 1976)

We are now going to consider the region of the planet known as Cydonia and there the absolutely remarkable is found in great abundance. There is an apparent correspondence between the complex where the Face is to be found on Cydonia, Mars – located at 41°N latitude – (see figures 1 above & 2 below) and the Avebury earthen rampart and ditch circle complex, just north of Stonehenge, England.

Cydonia Complex

Figure 2. The Cydonia Complex, Mars (Viking images 1976)

Crater and Wall
Figure 3. The Cydonia Crater and Wall (Viking image 1976)

Figure 3 is a close up of the Cydonia crater and the Wall, the latter some two miles long and remarkably straight. (The Face is about a mile long). The Wall clearly sits on top of the ejecta blanket. In other words, the existence of the wall must post date the laying down of the blanket. On the crater rim there is what appears to be a three-sided or tetrahedral pyramid.

South of the crater is a mound (see figure 2), which has an apparent anti-clockwise spiral ascending it with a pyramidal structure on its peak. This spiral mound is a mile in diameter and is approximately 500 feet high.

Due west of this mound is a cluster of what seem to be mainly pyramidal structures, one of which has obviously been damaged. This group is referred to as the City.

Five-sided Pyramid
4. The five-sided D&M pyramid (Viking image 1976)

Located to the south east of the City is a large five-sided pyramid (known as the D&M pyramid, see figure 4 above). As Erol Torun, a geomorphologist at the American Defense Mapping Agency has stressed, an object with five straight sides cannot be formed, or at any rate cannot be maintained, by the action of wind and weather. For the force that is sharpening one face will at the same time be causing any existing opposite straight sides or edges to erode.

Avebury Air View

Figure 5. Avebury Circle, part of the Avebury complex (north of Stonehenge, England)

Back in 1991 it occurred to me that Avebury circle, (see figure 5) with its earthen rampart and ditch, is a depiction of the Cydonia crater on Mars, suggesting that Silbury Hill (figure 6 below) – along with other features in the area – might be an analog model or 'mirror' representation of the key features of Cydonia.

Figure 6. Silbury Hill, part of the Avebury complex (north of Stonehenge, England)

Avebury map

Figure 7. Avebury Ordnance Survey Map

Working with the large scale UK Ordnance Survey map of the region, I then carefully measured the two sets of items in question and found them to be stunningly proportionate. That is to say, when the Cydonia mound-and-crater complex is reduced by a ratio of approximately 14:1, i.e. fourteen miles in Cydonia equals one mile at Avebury, it fits exactly on Avebury/Silbury (see figures 7, 7a and 8).


Figure 7a. Cydonia Complex, Mars with Avebury survey map combined (the red line is the Roman road)

Avebury circle, for its part, is 'the mightiest in size and grandeur of all stone circles', of a 'magnificent complexity' and measuring a quarter of a mile across. Today a village nestles comfortably within its circumference. One writer comments that if Stonehenge is thought of as a church, then Avebury is a cathedral.

Avebury circle consists principally of an outermost earth rampart, with an inner ditch whence the earth for the rampart was dug. About four million cubic feet of material was excavated in order to construct this enclosure. Circles of standing stones then formed further inner rings which were added at a later date.

Silbury Hill and Avebury Circle

Figure 8. Spiral Mound/Silbury Hill and Cydonia crater/Avebury Circle

Now let us compare the spiral mound on Mars with Silbury Hill in England. Silbury Hill, I should stress, is not a burial mound, and the entire purpose and significance of the Silbury/Avebury complex remains, at present, a complete mystery.

Nine million cubic feet of material was shifted to construct Silbury Hill from the surrounding area, the task has been estimated to have taken have taken hundreds of people many years years to accomplish. Interestingly, ancient Britons used to dance up the hill to a maypole on the top – in a spiral. Moreover, it is possible Silbury Hill was constructed as a spiral.

The material used to make up the spiral mound on Mars is not local, that too appears to have been brought to the location from elsewhere to construct the mound. Mary Bennett realised that the US Geological Survey Tanaka 2003 map shows the spiral mound (and a small companion conical mound to the south east – coloured dark pink) is comprised of a completely different material and/or has totally different characteristics to the plain upon which the spiral mound stands, see figure 9.

Cydonia crater/Avebury Circle
Figure 9. Part of the USGS Geologic Map of the Northern Plains of Mars.
The map follows a color scheme in which units are grouped by lithology or physical characteristics.

Cydonia crater/Avebury Circle

Figure 9a. Tetrahedral pyramid on the Avebury rampart and Cydonia crater

I had already noted a small mark on the Ordnance map of Avebury rampart (figure 9a above) exactly where the tetrahedral pyramid occurs on the crater rim in Cydonia. This mark was located above a gap in the Avebury rampart, just as the Mars pyramid is above a gap in the Cydonia rim. It is the only mound indicated on the Avebury rampart by the Ordnance surveyors and is clearly an analogue of the tetrahedron located in the corresponding spot on Mars.

David Myers (of the Mars Mission) and I surveyed the Avebury pyramid on the rim of the rampart in December 1991. This has, obviously, been considerably eroded over a period of nearly 5,000 years, and must once have been a still more impressive feature. The tumulus is indeed tetrahedral in structure but not regular, with two long sides and one short, so that it projects almost lozenge-shaped in one direction. These very same features also appear to be duplicated by the Cydonia rim pyramid.

As William Neil MA an archaeologist has pointed out, the Cydonia crater is a 'Causewayed Enclosure' and Avebury is also a colossal 'Causewayed Enclosure'. Causewayed enclosures predate the stone circles and were in place at Stonehenge and Avebury before the stones were erected.

So the tetrahedral pyramid on the Avebury rampart, north of a gap (a road actually) mirrored by the tetrahedral pyramid on the Cydonia rim, north of a gap (see figure above) – surely sets the final seal of proof, one would like to say the miraculous seal of proof, on a case which was nevertheless already proven without it.

We must stress again the impossibility, first, of mound plus crater rim in Cydonia and mound plus earth rampart at Avebury having by chance the same relative size, and being the same relative distance from each other.

Tangents to Cydonia Structures
Figure 10. The four roads on the Avebury complex form tangents to the structures on Cydonia, Mars

It is also interesting to note in figure 10 that the four roads in the Avebury complex all form tangents with the most significant features of the Cydonia complex – as well as the Avebury landscape. The roads tangent (pass to the side of) the south of the spiral mound/Silbury Hill, to the southern rim of the Cydonia crater/Avebury circle, the south-east corner of the five-sided pyramid and to the north-east corner of the location of the City.

It appears that tangents are strongly implied both on Cydonia and in the Avebury analog. And interestingly, the lines cross at the northern tangent of the Beckhampton roundabout (traffic circle).

Intelligent Placement

The following details calculated by archaeocryptographer Carl Munck indicate that the Face on Mars was positioned by intelligence (figure 11):

The Face on Mars positioned by intelligence
Figure 11. The Face on Mars was intelligently positioned – encoding Pi, the universal constant

The angles of a tetrahedron, 720° x 2 = 1440 multiplied by Pi, the universal constant, extends to 4523.893421, thereby encoding 41° 11’ 10.03080581" which is the precise latitude of the Face on Mars.

This can be verified by 41 x 11 x 10.03080581 = 4523.893421.

We could deduce from these findings that at some time in the past there has been physical and/or mental communication between Mars and Earth. NASA went to Mars on behalf of us all to look for life. In responding to the images of certain Cydonia features, is it not it regrettable that the agency appears to ignore, and has attempted to debunk, evidence that strongly indicates the work of intelligent life?

So to conclude, it already seems established beyond reasonable doubt that Mars must once have been inhabited by sentient beings. But even more dauntingly, it is also now absolutely clear that people on Earth 'knew' about that circumstance five thousand years ago, and perhaps even earlier. The second discovery of course reinforces the first.

Or rather, taken together, the two sets of data form a totally unshakeable case.

David S Percy

Aulis Online, 1995, updated 2019

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Mars images: NASA/Carlotto/Aulis
Maps: UK Crown Copyright