It is impossible to write on every science topic out there, which is awesome. There is so much science going on, in all parts of the world. Some of it is done in universities or in organizations but a lot of it happens in other spaces where someone sees a need or asks a question and they, or someone around them, responds. Science fairs are an awesome way for a small group of local individuals, often kids and youth, to ask and answer interesting questions. So rather than telling you about the projects myself, here is the Google Science Fair. Check out their awesome projects https://www.googlesciencefair.com/en/.