In a completely new wrinkle on the old adage, "Smile and the world smiles with you, frown and you frown alone," Japanese researchers are producing a generation of robots that can identify human facial expressions and then respond to them. A team lead by Fumio Hara, a mechanical engineering professor at the Science University of Tokyo, has built a female robotic head that can both recognize and express fear, happiness, surprise, sadness, anger, and disgust.

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