Here 32 grooves in the bedrock have been dated. Gregorian dates
(day, month, and year) are used. One metre is shown for scale. North is
shown by the arrow.
Grooves at Hugraivs, Gammelgarn, Gotland
| The direction of each groove were measured.
Then the distribution of the directions of the grooves around the
horizon was graphed. I concluded that their orientation is not random.
Computer simulations showed that the orientation of these marks
is not random. Most of them are
oriented east-west. Moreover, many are oriented towards the most
northern or most southern rising and setting points of the moon.
A professional astronomer, Göran Henriksson in Uppsala, Sweden,
calculated the exact rising and setting times and directions
of the moon many thousands of years into the past. An
examination of one group of grooves--for example, the grooves on one stone,
or on several adjacent stones, or those that lie close together in the
bedrock--shows an interesting relationship. If it is assumed, as our theory
suggests, that these grooves were
made in the direction of the rising or setting of the full moon on a
certain day, namely the winter solstice or the equinox, then it becomes possible
to match each set of grooves with a set of dates calculated by Henriksson.
. Since it is 19
years between such occasions and the direction varies in a complex way,
it produces a pattern that is in some respects
much like a fingerprint. The largest group dated consists of 32
grooves. It is very unlikely that a pattern like this could occur by
chance. If the theory is correct, the oldest groove in this group
was started March 19 in the year 3152 B.C. Then the second one was started nineteen
years later--March 19 in the year 3133 B.C.
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