In this chapter of the Sustainable Universe, we will explore the study of neurodegenerative diseases, such as Alzheimer's, Parkinson's or ELA, which are related not only to the physical health of the elderly but also to their emotions . Experts will explain the causes of these diseases and how they are being fought through academic research: from prevention methods to the development of an Alzheimer's vaccine or the use of video games and other communication tools for to improve brain activity of patients.