" The classification of super-recognizers emerged from an entirely different field of research: a clinical psychology experiment which was studying the opposite end of the spectrum: prosopagnosia. This is a clinical condition, sometimes described as face blindness, where people have extreme difficulty identifying faces. It can be enormously debilitating. A parent may not be able to pick their child up from school because they cannot recognize their offspring. Some sufferers cannot even recognize their own face on being shown a photograph of themselves. Prosopagnosia is an inherited condition; it can also be acquired through stroke or traumatic brain injury. You can take a quiz online to see where you lie on the prosopagnosia–super-recognizer spectrum. Most of us will be somewhere in the middle, with the vast majority proving better at recognizing their husband than I am. "

― , Written in Bone: Hidden Stories in What We Leave Behind