This publication is a summary of the documentary about the mystery of Alzheimer’s disease, unfortunately, I couldn’t find the video in English version but I leave the Spanish version as I consider it a very interesting documentary to see. STUDY The study was conducted in nuns between 80 and 107 years old. The study consisted of doing memory tests and continuous evaluation of its evolution for years. TRACING Most of the nuns agreed to donate their brain after their death…