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The Cheops pyramid, at more than
137 meters (originally 146,5) is the biggest of the
three main pyramids which rise from the plateau of Giza.
Of the seven wonders of the ancient
world, the pyramid of Cheops is the only one which has
withstood time. Its builders, in the time of the Old
Kingdom, worked with amazing precision; the base, with
a length of 230 meters, is oriented exactly to the north.
Generations of experts from all
over the world have investigated the complex system
of tombs inside the pyramid.
On the 22nd of March 1993 the
German Engineer Rudolf Gantenbrink made a sensational
discovery in the south shaft of the of the tomb known
as the Queen's Chamber. The camera of the mini-robot
"Upuaut 2", Gantenbrink's own construction, captured
the image of a stone seal, secured with two copper rivets.
On the 17th of September 2002, the
Egyptologist Zahi Hawass continued the exploration of
the south shaft with the "Pyramid Rover", another mini-robot.
It was able to determine the thickness of the stone seal
using ultrasonic and to drill through it. It then explored
the cavity behind it using an endoscopic camera. The result
was disillusioning: behind the stone seal the shaft continued
some 20 to 40 centimeters and ended with another stone
seal, perhaps another "door".