(Scroll down for video) A group of Archaeologist have been doing research in a cemetery in the northwestern Mexican state of Sonora, at a cemetery known as "El Cementerio," when they found odd alien looking skulls.
The work was done on behalf of Arizona State University, with the approval of the National Institute of Anthropology and History or INAH.
While working, the group made a shocking discovery.
They found some “alien-shaped" skulls. They found 25 skulls and 13 of them have deformed heads. The skeletons are believed to be 1,000 years old. Samples taken from one of the individual skulls date back to the year 943 CE.
Archaeologist Cristina Garcia Moreno, director of the research project explained that cranial deformation is believed to be done to differentiate between different social group and for ritual purposes. “We have not been able to determine why some wore ornaments, or why between the 25 skeletons only one was a woman," Moreno said.
Ryan Matthew, the host on the Science Channel, explained that the process of cranial deformation usually began in childhood.
When a baby was born they would be cradle-boarded. “They would put two boards around the head and wrap it very securely. Because the head of a child is very soft, it can be manipulated, the process took several months," Matthew said.