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Cellular engineering involves studying and altering the inner mechanisms of cells. Our work integrates microfluidics, soft matter physics, cell biology, and imaging to explore how cellular structures form and how cells react to external stimuli. Metabolic engineering is another key approach, focusing on understanding the organization and interactions of metabolic pathways inside cells. A significant research focus at Princeton examines liquid-liquid phase separation in cells, which drives the creation of membrane-less organelles. Tissue engineering examines cell groups—how they develop, the spatial and temporal signals that shape organ structures in health and disease, and how mechanical forces affect cell behavior and organization. Bridging cellular and tissue engineering, researchers investigate morphogenesis (organ development) and embryogenesis (embryo growth from a single fertilized cell). Our team explores how cells collaborate to form intricate tissue structures, creates mathematical models to analyze developmental processes, and examines how physical and chemical factors influence microbial communities and their collective behaviors.