Dartmouth researchers have made the world's smallest untethered remotely controlled robotic device that's about the size of the width of a human hair. Researcher Bruce Donald says, "When we say 'controllable,' it means it's like a car; you can steer it anywhere on a flat surface, and drive it wherever you want to go. It doesn't drive on wheels, but crawls like a silicon inchworm, making tens of thousands of 10-nanometer steps every second. It turns by putting a silicon 'foot' out and pivoting like a motorcyclist skidding around a tight turn." The device integrates power delivery, locomotion, communication, and a controllable steering system never before achieved in a machine this small. You can see a video of the tiny device in action as well as an interview with Bruce Donald on their video website.

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