Most of the people in the world are going to age. And it is good news to spend more time on the planet, but, being so, we will also have to face natural challenges such as loss of mobility, physical strength, memory, sight, hearing, as well as the appearance of diseases that, at some point, they will be disabling. If these conditions were not severe, we could continue to be productive people and bring benefits to society, but no one knows how many opportunities there will be.