Fluorescent microthermography is a fancy way of using special light to see how hot things are in really tiny spaces.
You know how when you look at a light bulb, it gets really hot and you can feel the warmth on your skin? Well, scientists can use special materials that glow different colors when they get hot.
They put these glowing materials onto tiny things that they want to study, like cells in the body, and then shine a special light on them. This makes the glowing materials light up and show scientists how hot things are in those tiny areas.
This can help scientists learn more about how the body works and find new ways to treat diseases.