 In this paper, researchers developed a novel method to identify and track the development of cardiac progenitor cells in human-induced pluripotent stem cells, HyPSCs. They used a TBX5-MYL2 lineage tracing reporter system to trace the development of the first heart field, FHF, which are the precursors of the left and right ventricles. Additionally, they used single-cell INA sequencing, SCRNASEC, to analyze the development of HyPSC's undergoing cardiac differentiation. The results showed that the majority of the cells derived from the FHF were left ventricular cardiomyocytes, suggesting that the left ventricle is more dominant than the right ventricle during cardiovascular development. This study provides valuable insight into the development of the heart and could be used to further understand the mechanisms behind congenital heart defects. This article was authored by Francisco X. Galdos, Carissa Lee, Soa Lee, and others.