In the first I will tell you some amazing Egyptian construction techniques and some of the questions which come from these construction and in second part there is a video which may give some answers...

Part1

The Great Pyramid a true masterpiece and has rightly earned the title of a “Wonder”. It was built with such precision that our current technology cannot replicate it. Historical analysis shows that the Pyramids were built between 2589 and 2504 BC. There are so many interesting facts about this Pyramid that it baffles archeologists, scientists, astronomers, and tourists. Here are the facts:

1-The pyramid is estimated to have around 2,300,000 stone blocks that weigh from 2 to 30 tons each and there are even some blocks that weigh over 50 tons.

2-The Pyramid of Menkaure, the Pyramid of Khafre and the Great Pyramid of Khufu are precisely aligned with the Constellation of Orion.

3-The base of the pyramid covers 55,000 m2 (592,000 ft 2) with each side greater than 20,000 m2 (218,000 ft2) in area.

4-The interior temperature is constant and equals the average temperature of the earth, 20 Degrees Celsius (68 Degrees Fahrenheit).

5-The outer mantle was composed of 144,000 casing stones, all of them highly polished and flat to an accuracy of 1/100th of an inch, about 100 inches thick and weighing approx. 15 tons each.

6-The cornerstone foundations of the pyramid have ball and socket construction capable of dealing with heat expansion and earthquakes.

7-The mortar used is of an unknown origin (Yes, no explanation was given). It has been analyzed, and its chemical composition is known, but it can’t be reproduced. It is stronger than the stone and still holding up today.

8-It was originally covered with casing stones (made of highly polished limestone). These casing stones reflected the sun’s light and made the pyramid shine like a jewel. They are no longer present being used by Arabs to build mosques after an earthquake in the 14th century loosened many of them. It has been calculated that the original pyramid with its casing stones would act like gigantic mirrors and reflect light so powerful that it would be visible from the moon as a shining star on earth.

9-Appropriately, the ancient Egyptians called the Great Pyramid “Ikhet”, meaning the “Glorious Light”. How these blocks were transported and assembled into the pyramid is still a mystery.

10-Aligned True North: The Great Pyramid is the most accurately aligned structure in existence and faces true north with only 3/60th of a degree of error. The position of the North Pole moves over time and the pyramid was exactly aligned at one time.

11-Center of Land Mass: The Great Pyramid is located at the center of the land mass of the earth. The east/west parallel that crosses the most land and the north/south meridian that crosses the most land intersect in two places on the earth, one in the ocean and the other at the Great Pyramid.

12-The four faces of the pyramid are slightly concave, the only pyramid to have been built this way.

13-The centers of the four sides are indented with an extraordinary degree of precision forming the only 8 sided pyramid; this effect is not visible from the ground or from a distance but only from the air, and then only under the proper lighting conditions. This phenomenon is only detectable from the air at dawn and sunset on the spring and autumn equinoxes, when the sun casts shadows on the pyramid.

14-The granite coffer in the “King’s Chamber” is too big to fit through the passages and so it must have been put in place during construction.

15-The coffer was made out of a block of solid granite. This would have required bronze saws 8-9 ft. long set with teeth of sapphires. Hollowing out of the interior would require tubular drills of the same material applied with a tremendous vertical force.

16-Microscopic analysis of the coffer reveals that it was made with a fixed point drill that used hard jewel bits and a drilling force of 2 tons.

Part 2:-

there is a video which gives a introduction of new technologies and some answer to unknown questions.