If one wishes to understand how technologically advanced our ancestors were, it is worth taking a look at their building techniques. One example is a technology that apparently was used to damage the stones, leaving some uncanny marks on them.
This suggests some advanced machine manipulation. However, the most mysterious thing about these ancient constructions is related to the construction of the sites, in particular, featuring deep protuberances.
The best example of this is the megaliths at Yangshan Quarry.
This evidence not only points out to a very advanced ancient civilization ... Read even more
