U.S. & World History – The mysterious crystal skulls from South America that were discovered in the 18th century has been the subject of countless theories regarding their origin and purpose for their creation. Some have speculated that they have some unknown power that could cause the world to end, while others are convinced that they were definitely connected to the occult. The Journal of Archaeological Science after years of research has come forward stating that they believe they can easily prove that the skulls were just common souvenirs sold in many stores in the 18th century, reminding people to make important decisions with a clear head.