This past week saw an intriguing confluence of multiple disciplines, in the form a new artificial stingray model its creators call a "living robot," and an unconventional means of studying the human ...

It’s a bizarre sight: With a short burst of light, a sponge-shaped robot scoots across a tiled surface. Flipped on its back, it repeatedly twitches as if doing sit-ups. By tinkering with the light’s ...