C57BL/6 is a type of mouse that scientists often use for their experiments. It's like having a special kind of toy that scientists can play with to learn more about how things work. This type of mouse is really good for experiments because it has certain things that make it very useful for scientists. For example, this mouse is really good at remembering how to do things, like how to find its way around a maze. It's also really good at making baby mice that are healthy and strong. Scientists use C57BL/6 mice to learn more about all kinds of things, like how our bodies work, what causes diseases, and how to make new medicines that can help us feel better.