How does one charge 1,000 robots? It would be a pain to plug them all in individually. Luckily, there's an easier way with Kilobots. These little robots have round bodies about the diameter of a quarter, with a metal spring on top and three thin metal legs. To charge them, you push them -- 10 at a time -- against a long charging rack. They all charge at once, as long as each has its spring top and two of its legs touching the rack. "It's kind of like a bumper car charging system," says Mike Rubenstein, who uses a long stick to corral his Kilobots.
According to the US National Park Service, a tourist crashed a camera-equipped drone into Grand Prismatic Spring, the park's largest geothermal hot spring. In May, the National Park Service banned drones from Yosemite National Park, and in June that ban expanded to include all national parks. The Prismatic Spring crash is not the first drone crash on a national park, and it's unlikely to be the last.
It's a weird sensation, being born in midair. Within seconds, users exploring Liam Young's conceptual art project "City of Drones" find themselves staring out the eyes of an unmanned robot, falling gently towards what appears to be something like the ground. "City of Drones" is as much statement as game, an artful exploration of a world filled only with robots and obstacles.
Drones are the public face of counter-insurgency. Mechanical, unmanned, distant, they fly above battlefields from Pakistan to Yemen, their unblinking electronic eyes streaming video back to uniformed pilots secure on military bases elsewhere. The United States is the best-known drone operator in the world, but it's hardly the only country that uses them. The Israel Defense Forces are using drones over Gaza as part of "Operation Protective Edge," the IDF's term for their latest anti-rocket operations in the strip.