What's 3.6 cm tall (1.4 in), and could one day be performing tasks such as walking through disaster site rubble looking for trapped survivors? It's Zippy, which is reportedly the smallest ...

Bipedal robots aren’t just human-shaped machines with arms and legs. At the cutting edge of robotics, they can also take the form of tiny, power-packed marvels. Meet “Zippy,” a palm-sized, two-legged ...