complete without addressing the pyramids of egypt for generations people have speculated over how these marvels could have been constructed by a society with no concept of machinery or modern building techniques there are movies books and tv shows dedicated to the idea that aliens must have come to earth to assist in their construction but that answer is hardly scientific and is certainly an insult to the memory of those who sweat and blood went into the real construction how ancient egyptians could have moved NUMBER_TOKEN million limestone blocks that weighed on average NUMBER_TOKEN tonnes is obviously a tough question to answer i mean how could anyone do that some materials have to be transported over NUMBER_TOKEN miles it's estimated the great pyramid alone took about NUMBER_TOKEN years to construct egyptologists estimate between NUMBER_TOKEN NUMBER_TOKEN and NUMBER_TOKEN NUMBER_TOKEN workers were needed to do the job the method behind it has long baffled historians it seemed entirely impossible but if you don't want to accept aliens as the answer then there has to be a better solution researchers think they have the solution based on wall paintings from the tomb of dahuta hotep the artwork shows a person standing before a wooden sledge the kind that was used to transport massive stone blocks and the person is wetting the sand after seeing the painting a physics professor at the university of amsterdam conducted an experiment to see how a wooden sledge traveled over sand if the sand is dry the sled pushes it like a plow until it builds up in front slowing the sledge down wetting the sand made it rigid and eventually the piles in front were non-existent and the sledge traveled with little resistance it's the same principle as building a sand castle no water and the sand is impossible to build with too much water and it makes mud but the right amount of water makes sand stick like glue that creates a perfect bridge for traveling on with the precise amount of water on the sand it would take half as many workers to push the same amount of stone it's likely the egyptians who also used thin layers of desert clay with the right moisture it creates a perfect lubricant there's evidence of it between stones in the finished pyramid indicating that it was used to help achieve the perfect final position so i really hope you enjoyed this video if you did and you're looking for more mysteries why not check out my true crime podcast the casual criminalist it's available both as a youtube channel and as a traditional audio show on apple podcast spotify and just about everywhere else two episodes a week on that one so check it out if you want some more content link below and thank you for watching
START_SELFPROMO_TOKEN so i really hope you enjoyed this video if you did and you're looking for more mysteries why not check out my true crime podcast the casual criminalist it's available both as a youtube channel and as a traditional audio show on apple podcast spotify and just about everywhere else two episodes a week on that one so check it out if you want some more content link below and thank you for watching END_SELFPROMO_TOKEN