I'm not going to pretend to know anything more than what I saw on the tv show or the scant amount of research I did on the internet out of interest. My understa

I'm not going to pretend to know anything more than what I saw on the tv show or the scant amount of research I did on the internet out of interest. My understanding, which I will not defend because I have zero background, is that the megaliths, ie. huge stone constructions, are considered to be much more advanced than something at that stage in human history. In addition, I think there was suggestions that it was involved in astronomy which was also not expected for something that old.