“Teotihuacan” is without doubt, one of the most mysterious places within the Americas, or possibly the earth.
While the incredible complexity and architectural precision has baffled archaeologists for decades, there is a far more perplexing mystery specifically surrounding the pyramids within this ancient place.
The presence of “Mica,” a powerful radioactive insulator, is perhaps one of the biggest enigmas of these great ancient structures.
Established, or quite possibly re-inhabited around 100 BC, until its fall between the seventh and eighth centuries.
Teotihuacan was one of the largest cities in the ancient world, with over 150,000 inhabitants at its peak.
According to archaeologists the advanced design of Teotihuacan suggests that ancient builders had advanced knowledge, not only of architecture, but of complex mathematical and astronomical sciences.
Source: Mystery History