Walking on two feet is something humans took a very long time to master, but they eventually did it, and nobody really thinks about it anymore. But if you want to get a sense of what intricate ...

Imagine a robot that can walk, without electronics, and only with the addition of a cartridge of compressed gas, right off the 3D-printer. It can also be printed in one go, from one material. That is ...

To a robot, it might look like something from a horror film. Parts — a battery, circuit boards and wiring —are arrayed in pieces on a white lab bench. Metallic arms and legs lay inert on nearby ...