Centuries After Discovery, Red Blood Cells Still Hold Surprises Faculty, Research / August 7, 2025 Share: Author: Claire Sibley Penn Engineers have discovered that red blood cells actively drive blood clot contraction through osmotic forces, overturning the long-standing belief that only platelets perform this role and offering new insights into clotting disorders and stroke prevention. Read More Gregory Campbell Defends Dissertation Pedaling Toward a Sustainable Future