SpaceX is giving the public a look at the interior of the Crew Dragon spacecraft. Sporting a minimalist design, it’s intended to not only provide safety, but a considerable degree of comfort.
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.