Can anyone tell why people repeat parrot fashion...." its not possible for us yo build the pyramids today so it must have been alien technology"
The Egyptians had infinite labour force[ manpower i.e slaves] and an endless amount of time.
If we had the same luxuries today we could easilly do it, Im not saying their are not amazing structures,but i fail to see why it would be impossible in the present to do it.
It's to do with building methods. A group of builders can build a skyscraper because they know how to do so, but ask them to build a pyramid or stonehenge they wouldn't have a clue. It's tfor the same reason that many people now longer know how to use a bow and arrow, or how to start a fire with bits of wood. It's because as a society advances people cease teaching that which is no longer needed, as each generation only uses those pieces of knowledge from the previous which they need.
As for the reason "why people repeat parrot fashion", its happens because some ideas just catch on, in part because of who is saying it. For example, after it was annouced that King Tuts tomb had been discovered, an army Sgt was given the job of guarding the tomb and preventing the press entering it. So to make his job easier, he decided on the spur of the moment to tell them that if they entered they'd suffer a curse. Despite the fact that afterwards he repeatedly explained he made the curse up, people believed there's is a mummy's curse because the source was a respected figure of authority. Combined with the fact that such things make for a good story.