Somewhere between the visible and the knowable lies the most dangerous territory in medicine — the plaque that looks stable but is not. Researchers at the University of Southern California have developed a stretchable catheter woven with liquid metal circuits that reads the electrical signature of arterial deposits, distinguishing the quietly dangerous from the merely present. Where imaging shows form, this device seeks to reveal intention — the metabolic restlessness of plaque on the verge of rupture. It is an early step, but one that reframes the question cardiologists have long struggled to