Singapore became the first country in the world to launch a self-driving taxi service, beating ride-hailing giant Uber Technologies to public road tests by mere days.
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.