<p>➀ Researchers at the EPFL School of Engineering have developed high-efficiency drone wings inspired by bat wings, which could lead to improved efficiency in various aerial vehicles.</p><p>➁ The study found that the lift increase in these wings comes from the flow following the smooth curvature of the membrane wing rather than a leading-edge vortex.</p><p>➂ The findings could also be applied to enhance the efficiency of wind and tidal energy harvesting devices.</p>