Check out Paul Butt‘s beautifully illustrated infographic on the history of Mars exploration by robotic probes, and the many successes and failures along the way.
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.