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Scientists at the University of Pennsylvania have demonstrated a self-assembling robot, capable of accurately reconstructing itself after being literally kicked to pieces. The robot was built using shape-shifting modules, each of which is made up of a pair of metal pieces linked by a motorized hinge. These modules, some of which are equipped with a digital camera and processor, also include magnets that are used to join them to adjacent modules in any of four orientations. In one demonstration, an assembled robot was shown to return to its original shape after being kicked apart into three modules, which were scattered in distance from one another. The pieces almost instantly began to "crawl" across the floor towards each other, until reunited into the original shape and again began to walk as a whole robot, as if they were never severed.
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