Giza Pyramids built by aliens

As described above, on my side, there are many theories about the construction and meaning of the pyramids. No 100% could be demonstrated, there are weaknesses in each argument, a claim could not yet answer all questions.

Reason for this puzzle is the rate inexplicable fact that there is no evidence or other records of the pyramid. There are only two explanations: either the Egyptians were building the pyramids, so commonplace, that there was no reason for records, or it was a top secret project. As is known, the famous pharaohs happy with their exploits - but on the establishment of such huge buildings, they lose nothing, and there are no drawn scenes and the like. Records and plans, however, must have existed, because no one would plan to build a pyramid. The question of where these plans are gone, will probably long remain the secret of the ancient Egyptians. Maybe this knowledge was preserved in the Library of Alexandria until a fire destroyed everything.

The majority of today's Egyptologists holds the pyramids for tombs of the Pharaohs, where they are arguing on narratives of Herodotus and other historians of antiquity. Astrology-oriented scientists see replicas of the pyramids of the stars (Orion Mystery) and facilities that enable the prediction of the future. Another theory is that the pyramids were built in order to employ the people, because during the flood season, no crop will be operated. Mathematics-inclined scientists believe the pyramids for the embodiment of mathematical formulas, that is an over-sized reference book. Probably for Egyptology inakzeptabelste theory says that the pyramids were built by aliens. As you can see, there is speculation in all possible directions.