The International Union of Biochemistry and Molecular Biology (IUBMB) is like a big club where scientists from all around the world who work with biology and chemistry can join. They work together to learn more about how things work inside our bodies, like how our cells make energy, how our DNA shows up, and how different proteins help us stay healthy. It's kind of like when you and your friends work together on a science project, but on a much bigger scale!