An iCub robot built by the Italian Institute of Technology tracks a ball in the Robotville exhibition at the Science Museum on November 29, 2011 in London, England. The Science Museum's Robotville exhibition showcases 20 unique and cutting-edge robots from European research laboratories, it is free to enter and runs from December 1–4, 2011. (Photo by Oli Scarff/Getty Images)

Robotics PhD student Luke Wood works on KASPAR, a robot built at the University of Hertfordshire to help autistic children, in the Robotville exhibition at the Science Museum on November 29, 2011 in London, England. (Photo by Oli Scarff/Getty Images)

FILOSE robot built by the Taalin University of Technology which is controlled by motion sensors on a moving person, is displayed in the Robotville exhibition at the Science Museum on November 29, 2011 in London, England. (Photo by Oli Scarff/Getty Images)

Robotics student Gildo Andreoni works on a Dexmart robotic hand built at the University of Bologna in the Robotville exhibition at the Science Museum on November 29, 2011 in London, England. (Photo by Oli Scarff/Getty Images)