A group of divers recently plunged into the Sak-Aktun cave system in the Yucatan Peninsula. There, they found some 12 thousand-year-old human skeletons. An specialist archaeologist, Guillermo de Anda, believed that a human skull wrapped in limestone was discovered in one of the caves.

Rainwater, according to scientists, is to blame. Many of those bones, according to many historians, belong to Maya Indians who went down there looking for water. Researchers found the above-mentioned skull to be incredibly interesting, but after further study, they decided to avoid talking about it.

Furthermore, a Mexican journalist named Pedro Sanche alleged that he received confidential details from an informant, claiming that the skull, in fact, had an artificial implant. While experts initially assumed it was just a normal metal plate embedded in the brain, it turned out to be something entirely different. It was a microchip inserted more than 12 thousand years earlier, according to Sanche.

Because the entire matter is known as top secret, no one understands who inserted the microchip in the Mayan’s head or what the consequences of this revelation are.