A team of researchers from the École Polytechnique Fédérale de Lausanne (EPFL) has developed RAVEN, a fixed-wing drone that can hop like a bird.RAVEN's design eliminates the need for traditional launching methods and makes flight more energy-efficient.The drone's legs mimic the movement and propulsion of bird legs, allowing it to walk, hop, jump, and launch into flight.The researchers believe RAVEN could have a lasting impact on the design of future drone models, leading to more energy-efficient and adaptable drones.