A 5,300-year-old skull has been found in a Spanish tomb by a group of archaeologists.
It seems to be the oldest evidence of ear surgery carried out in the world.
The skull is believed to be a middle-aged woman, who lived in the Neolithic Age.
The evidences point to a mastoidectomy, a surgical procedure possibly performed to relieve the pain.
There are visibility of two perforations on both sides of the skull near its mastoid bones.
It indicates that the surgery was attempted to relieve growing pressure on the ear canal.