As we get older, curiosity may wane for things that we don’t care about, but curiosity may be critical to maintain in older age to stimulate our brain and prevent Alzheimer’s disease by triggering the production of new brain cells in older age. Curiosity can be divided into two different types: state and trait curiosity. State curiosity is a momentary feeling of interest or engagement that people experience when asked about specific topics. While the two types of curiosity are related, state curiosity can be stimulated when we encounter something that piques our interest. Curiosity may help keep our brain sharp in older age, allowing us to explore topics that we find of interest, and this stimulates neurogenesis, which allows brain cells to develop even in older age.