Female face robot. Female face robot lit from behind to reveal the machinery beneath the skin. The machinery will change the contours of the robot's skin to create facial expressions. It does this by using electric actuators which change their shape when an electric current is passed through them. The devices will return to their original shape when the current stops. Unfortunately these actuators proved very slow at returning to their original shape, causing an expression to remain on the face for too long. This robot face was developed at the Laboratory of Fumio Hara and Hiroshi Kobayashi at the Science University, Tokyo, Japan.