Engineers at Princeton University have drawn inspiration from the humble grasshopper to revolutionise tiny-robot flight. Traditionally, insect-sized flying bots have mimicked bees or flies, flapping constantly, a process that’s power-hungry and limits battery size. Grasshoppers, however, combine jumping with gliding, offering a more energy-efficient solution.

By studying the American grasshopper’s unique folding wings, researchers created 3D-printed models to test various aerodynamic features. Their design allows robots to switch between flapping for thrust and gliding for power conservation.