A RARE type of brain surgery was being performed 3,500 years ago, say archaeologists.
They discovered skeletons of two Bronze Age brothers who may have had leprosy.
One had a 30mm square hole in the skull where a piece of bone had been removed.
The procedure — trepanning — is one of the oldest known surgeries, dating back 7,000 years.
Holes were drilled to let evil spirits out.
Later, it was developed as a way to ease pressure on the brain — and is still used today.