Did you know that the height of the pyramid (481 feet) is almost exactly 1/1,000,000,000 of the distance from the earth to the sun (480.6 billion feet)?
What about the fact that although the Egyptians kept very careful records about everything they ever did;  every king they had,  every war they fought,  and every structure they built, there were no records of them ever having built the pyramids?
If you take the perimeter of the pyramid and divide it by two times the height,  you get a number that is exactly equivalent to the number pi (3.14159...) up to the fifteenth digit.  The chances of this phenomenon happening by sheer chance is remarkably small.  Did the ancient Egyptians know what the number pi was?  Not likely,  seeing as it was a number not calculated accurately to the fourth digit until the 6th century,  and the pyramids calculate it to the fifteenth.
the Great Pyramid consisted of well over 100,000 stones. But the Egyptians had no machinery, engines, or construction equipment.
Theories suggest the Egyptians built these pyramids, but this asks us how Egyptians hauled 20 ton stones and placed them perfectly Hundreds Of Feet high (145.75 m, 481 ft high).. Some suggest they built a ramp with stones that went from the ground to the top.
If it took 10,000 workers per month over a 20 year span to build the Pyramid like experts suggest, There wouldn't be enough people in a 500 mile radius to make this possible.
The actual method of ramps used is not known with any certainty, but it most likely started with a single ramp by which means the blocks could be hauled into position. The blocks were laid down in layers, each successive layer being a little smaller in area than the one below it to give the pyramid its shape. As the blocks are layed onto a level surface, the same height as the ramp, no lifting was required, only hauling of the sledges. Removing the blocks from the sledge may have involved no more than dragging the block off the sledge. The entire pyramid could have been built using this simple system without a single block actually having to be lifted off the ground! No alien technology required. Very smart people these Egyptians.

As each successive layer was laid the ramp would need be heightened, and lengthened so as not to be too steep. Eventually this method would reach a limit where the size and construction of the ramp would be nearly as complex as the pyramid. The easiest way around this problem is to curve the ramp around the pyramid as the pyramid increased in height.

Finally, all that remained was the placing of the top stone, followed by the placing and fitting of the smooth white blocks. As the facing stones were placed so the ramp could be removed as they worked their way back down. The pyramid required a certain amount of interior design and construction for the burial chambers, and this was no easy task. The blocks that protected the burial chamber were 50 ton blocks of granite. Even with the huge teams of men at their disposal and a system of ropes and overseers guiding them, it would have been a difficult and dangerous task. There are still marks visible on the blocks and in the interior of the pyramid that were used to guide the blocks into position. Difficult yes, impossible no.