The most urgent and realistic problem is traffic. Even if there is enough manpower, it is impossible to transport this 2.5-ton to 160-ton boulder to the construction site. In the car? With horses? No way! There were no horses and cars in Egypt at that time. Cars and horses were introduced from abroad in16th century BC, that is, after the completion of the Great Pyramid of Khufu 1000.
Some people think that it was transported with a crowbar and a round stick. However, this method needs to consume a lot of wood. At that time, the main trees in Egypt were palm trees, which were far from meeting the needs of transportation in terms of quantity, growth rate and wood hardness, and it was almost impossible to import wood.
Some people think it's a water transport law. 1980, Hawass, inspector general of Giza, Egypt, took a core sample. When he dug to a depth of more than 100 feet, he found a rock wall at least 50 meters deep, which may be a port dug in Egypt during the Fourth Dynasty. Later, some people discovered the waterway connecting the port. However, if there are no pulleys, winches and sufficiently advanced lifting equipment, it is more difficult for this heavy boulder to go down the mountain, board the ship and land than to pry it on land. Besides, there is a drop of at least 50 feet between the water surface and the rock bank! And the pyramids on the west bank of the Nile must be stones on the east bank of the Nile!
Can't it be transported by air except by land and water? This is really a mystery.
An industrial chemist in France studied the pyramids from a chemical and microscopic point of view. He believes that these stones are not seamless, but a combination of lime, rocks, shells and other substances. Because the adhesive used has strong curing power, it is almost impossible to tell whether it is natural stone or artificial stone. Of course, this can properly solve the problem of transportation difficulties. But as circumstantial evidence, the 2.5 cm long human hair found in the stone is still too little; This outstanding adhesive is not only not recorded in ancient books, but also has not been analyzed by chemists by modern means.