Google’s self driving have been involved in 11 crashes since they first hit the road six years ago — but a good number of those seem to have been caused by humans ploughing into the bank of them.
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.