Discovering one skullc is spooky. Discovering two skulls is scary. Discovering 15 skulls? That downright, dare we say, bone-chilling.

So keep in your thoughts the group of archaeologists who discovered a heap of broken skulls and jaw bones from about 15 individuals at the site of the Neolithic village Masseria Candelaro, located in what is now Puglia, Italy. In a study published in the European Journal of Archaeology, the team wrote they believe the skulls were likely collected over the course of close to three centuries and used in some sort of ancestral ritualistic practice.