A robot is any mechanical device designed to perform the work usually done by a human. However, not all robots look like humans. Humanoid robots do. With structures based on the human body, humanoid robots are capable of walking with a biped gait, interacting with humans, gaining new skills without assistance, and recharging themselves. Scientists use them to research the human body—in order to improve prostheses, for example—but they have many other functions. What else can humanoid robots do? Discuss