“European start-up Relayr believes that its WunderBar, a hardware kit comprised of seven smart modules, could provide app developers with the toolbox to bring networks of interoperating gadgets closer to reality.”
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.