A schematic illustration of the optics-driven drones (ODD) in use.Photo: Northwestern Polytechnical UniversityChinese scientists develop laser-powered drone to stay aloft ‘forever’- Research team says it has cracked the problem of keeping drones in the air for extended periods which has limited their use, until now- System uses laser beam to power optics-driven drone remotely by converting light energy into electricityA schematic illustration of the optics-driven drones (ODD) in use.Photo: Northwestern Polytechnical University"