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

By Bill Detwiler

Bill Detwiler is Editor in Chief of TechRepublic 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 support specialist in the ...