North America’s farmers, many of them self-taught, are creating their own technology revolution, building robotic equipment, satellite-navigation networks and mobile apps designed to make their operations more efficient
Robots clean rivers and sort waste, monitor ecosystems, and inspect renewable-energy infrastructure. But even the greenest robot has an environmental footprint.
EPFL engineers have designed acoustic cavities that convert sound waves into thrust, propelling small robots and ultralight aerial vehicles without on-board actuators or electronics.