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So sweet. Great technology. Good hard work. How filling after 45 years ago.








45 YEARS AGO TODAY: Apollo 17 astronaut Gene Cernan on the Moon, December 11, 1972.
(NASA)
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Great.
The Great pyramid of Giza has 8 sides not 4!!

You may know that a pyramid has 4 faces ( excluding the base ) and the pyramid of Giza has been the popular exemplar for a pyramid.
But, the great pyramid has 8 faces ( excluding the base ), not 4!!
PC: The History Channel
In his book The Egyptian Pyramids: A Comprehensive, Illustrated Reference, J.P. Lepre wrote:
One very unusual feature of the Great Pyramid is a concavity of the core that makes the monument an eight-sided figure, rather than four-sided like every other Egyptian pyramid. That is to say, that its four sides are hollowed in or indented along their central lines, from base to peak.
This concavity divides each of the apparent four sides in half, creating a very special and unusual eight-sided pyramid; and it is executed to such an extraordinary degree of precision as to enter the realm of the uncanny. For, viewed from any ground position or distance, this concavity is quite invisible to the naked eye.
The hollowing-in can be noticed only from the air, and only at certain times of the day. This explains why virtually every available photograph of the Great Pyramid does not show the hollowing-in phenomenon, and why the concavity was never discovered until the age of aviation.
It was discovered quite by accident in 1940, when a British Air Force pilot, P. Groves, was flying over the pyramid. He happened to notice the concavity and captured it in the now-famous photograph. [p. 65]
Satellite image of the Great Pyramid.
Were the pyramids built this way on purpose or did it turn out this way over time is something that still requires a much deeper investigation.
** The Great Pyramid of Giza has 8 Side [Video]
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