Photos: Prototype robots

These "gears" are covered with electromagnets or half-capacitors. When placed next to each other, they will cause each other to spin, depending on the state of the magnet, and propel each other.

Michael Kanellos/CNET

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Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop supp...