Waltzing microbots are all the rage at Duke University.

Researchers there today said they made microrobots shaped something like a spatula but with dimensions measuring just microns, or millionths of a meter pirouette to the music of a Strauss waltz on a dance floor just 1 millimeter across. In another sequence, the devices pivot in a precise fashion whenever their boom-like steering arms are drawn down to the surface by an electric charge. This response resembles the way dirt bikers turn by extending a boot heel, researchers said. The researchers said they have also been able to get five of the devices to group-maneuver in cooperation under the same control system.