Summary:

• **What Scientists Discovered**: Researchers at the University of Macau found a new way to help the body make more heart muscle cells, called cardiomyocytes. These special cells are important because they help your heart pump blood throughout your body, and when people get heart disease, these cells can be damaged.

• **Why This Matters**: When heart cells are damaged, the heart doesn't work as well, which can make people very sick. By figuring out how to make more of these cells grow, scientists hope to help people whose hearts have been hurt by disease or injury feel better and live healthier lives.