Pengju Li, University of Chicago Pritzker School of Molecular Engineering, The Conversation Scientists have designed a solar panel-like pacemaker that can precisely control heartbeats. Eugene Mymrin/Moment via Getty Images By harnessing light, my colleagues and I designed a wireless, ultrathin pacemaker that operates like a solar panel. This design not only eliminates the need for batteries but also minimizes disruptions to the heart’s natural function by molding to its contours. Our research, r...