Recent investigations into the ancient artifacts left behind in the land of Egypt has left many researchers to conclude that the beliefs of Egyptologists about the age and methods of construction are wrong and wrong in massive ways.
The latest understandings is that there was a previous era of high civilization that collapsed and the follow on -what we call “ancient Egypt” was merely perhaps survivors of the previous civilization that took what they managed to retain and re-purposed the stone artifacts of the older civilization, much like the Muslims in Cairo after an earthquake wrecked their city who then scavenged the limestone cover blocks off the Great Pyramid to rebuild their city.
as Solomon said along time ago, ”there is nothing new under the sun”. Individually we mature, often grow wise and full of facts and understanding, and then when we are finally knowledgeable enough to be usable to our society... we die. A great tragedy that, it would seem. All those thousands of years it took to grasp the idea that the universe does not orbit around a flat earth...
and then faster and faster we understand invisible things of great import, until our leaders get persuaded to trust some buffoon who blows civilization up .......again.
Press pause, wait out another ice age, Lose all memory of the preceding Age, and start over.