For his new project “Unequal Scenes” Cape Town-based photographer Johnny Miller used a drone to show the inequality that exists in the Republic of South Africa.
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.