Archaeologists keep finding ancient human skulls with perfectly round, intentional holes, and the impossible part is that the patients survived. This episode synthesizes archaeology, medical history, and unsettling 20th-century accounts to explore why humans have been drilling holes in their own heads for ten thousand years, from Neolithic surgeons to living-room enthusiasts.

We explain how bone remodeling proves long-term survival, why freshly knapped flint acted as a sterile scalpel, and how ancient Peruvian surgeons mapped the skull's anatomy to reach 80 percent survival rates. We cover the spiritual and practical motivations, debunk the migraine myth that grew from a single misprint, and trace the disturbing voluntary trepanation movement of the 1960s and the modern craniotomy that descended from it.

• How smooth, healed bone e ...