Archaeological riddles which nonplus scientists

One thousands years ago people could make a number of inventions which still remain riddles for modern science. For example, a figure of a bird which is amazingly similar to the modern plane, or the strange bronze dodecahedrons haunting scientists already of 300 years. This article is devoted, just, to such archaeological artifacts which secret is not revealed yet. Source: dzeninfra.ru Kumbemayo's Stone aqueduct To Peru, approximately in 20 kilometers to the southwest from Cajamarca, is one of the strangest archaeological monuments in the world and the proof of that the primitive...