Skull with hollow practiced in the form of a lock

Register multiple archaeological examples of skulls carved into the long prehistory and pre-Anthropocene history due to various causes, such as the impact of projectiles and weapons sharp, or as a result of trepanaciones and other therapeutics. But, until the present, none had shown never a form of lock and, much less, an opening with a profile cut so precise and clean. Hence, the high-probability of being in a type of very advanced technology in the intrusion by a third party on those areas most deprived of the individual, with the aim of establishing some kind of access and control over the conduct and/or the will of the people during the Anthropocene age.