Ophthalmologists come in all shapes and sizes. But this tiny Robotic Retinal Dissection Device (aptly named "R2D2"), is the smallest we've seen so far. What's more, it operates from inside a single ...

Robots have come a long way. Once "dumb" machines unable to walk a straight path, now they're in factories, in our phones — speaking to us, learning about us. We've seen a robot designed to shoot guns ...