The human body is a tapestry of genetic variation, a living record of evolutionary history woven over millennia. While striking traits like heterochromia or polydactyly immediately capture the eye, many of the most unusual physical features are so subtle they go completely unnoticed, even by the individual who possesses them. One such minuscule yet profound example is the preauricular sinus (P.A.S.), the tiny hole, pit, or dimple located near the junction of the face and the upper ear cartilage.
