© Joshua Shapiro photo by Vera Manaleo
These skulls, found near the ancient ruins of Mayan and Aztec civilizations (with some evidence linking the skulls with past civilization in Peru) are a mystery as profound as the Pyramids of Egypt, the Nazca Lines of Peru, or Stonehenge. Some of the skulls are believed to be between 5,000 and 36,000 years old.
A crystal skull is a stone carving in the shape of a human skull. The sculptures vary in size from a few inches to life-size. Some are made of pure quartz crystal, but many are made of other types of stone found in abundance on Earth. Some stone skulls are genuine artifacts from Mesoamerican cultures such as the Aztecs and are known as skull mask or death heads.