Hi Cigdem,
Another good book on this is “Fingerprints of the Gods” by Graham Hancock. It is about 800 pages, very informative and has some very interesting theories.
Some info (among others) I found particularly interesting were:
The Great Pyramid of Giza (Khufu) has a true height of 481.3949 feet, it has a base perimeter of 3023.16 feet which is a ratio of 2pi (the same as a circles radius to its circumference). It weighs approximately 6 million tons consisting of approximately 2.3 million blocks weighing anywhere between 2.5 tons and 15 tons.
It has a base perimeter ratio of 1:43,200 to the equatorial circumference of the Earth, it has a similar ration (to within less than 1 foot) of 1:43,200 from its height to the polar radius. This Hancock states is no coincidence “The ratio itself seems to provide that confirmation, for the simple reason that 43,200 is not a random number (like, say, 45,000 or 47,000 or 50,500 or 38,800). On the contrary it is one of a series of numbers and multiples of those numbers, which relate to the phenomenon of precession of the equinoxes...”
This displays ancient knowledge of both pi and precession many thousands of years before it became more commonly known and certainly explainable (Sir Isaac Newton was among the first to explain and demonstrate that precession results from the non-spherical shape of the earth in the seventeenth century).
There is also significant information that seems to demonstrate that the Earth was mapped possibly many thousands of years ago and in particular a map published by Philippe Bauche in 1737 (that Hancock believes was based on lost ancient source maps).
According to Hancock, “What Bauche gives us is an eerily precise representation of Antarctica as it must have looked when there was no ice on it at all.” He goes on to point out that “His map reveals the subglacial topography of the entire continent (Antarctica), which we did not have full knowledge of until 1958”.
On the whole he raises some deeply interesting points and I am glad I read it and intend to read it again in the New Year despite the fact the author acknowledges subsequent flaws in two of his ‘theories’ - actually I liked this because he was willing to admit when he had indeed made a 'proven' mistake, one of which was related to some inscriptions inside one of the Pyramids, that on examination (He was initially denied access by Egyptologists to examine these particular stones) proved to be inaccurate.
Thanks - Steve
QUOTE (Cigdem Eksi @ Nov 24 2008, 05:24 PM)

In the 1990s, a few egyptologists put forward the claim that the three major
pyramids in Giza were -intentionally- constructed in relation to the three stars
of the constellation of Orion as they appear in 10,500 BC.
Orion Correlation Theory
http://en.wikipedia.org/wiki/Orion_Correlation_TheoryThe idea that the Ancient Egyptians built the pyramids and the Great Sphinx
to represent the positions of some stars in certain constellations (such as Leo
and Orion) is exciting, yet controversial.
Orion or Cygnus?
Below is a review of Andrew Collins's Book, Was Giza Constructed To Depict The
Constellation Of Cygnus? by Greg Little. Collins claims that the Great Sphinx
is perfectly aligned with the stars of the constellation Cygnus.
http://www.mysterious-america.net/hallofrecordsa.html