“Airbus Group plans to test a prototype for a self-piloted flying car as a way of avoiding gridlock on city roads by the end of the year, the aerospace group’s chief executive said on Monday.”
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.