Old McDonald has a farm, but he may have to run it without beef cows. New research at the Hebrew University of Jerusalem (HUJI) shows – for the first time – that cow cells can naturally become immortal. They can continue to divide indefinitely without genetic modification (GM) or any abnormal transformation. This overturns long-held assumptions that bovine cells could be made immortal only through gene editing. The new technology supplies a safe, stable, and scalable source of cells for