Long ago, it became clear that it’s easier to design robots to do “difficult” things like playing chess and doing mathematics than it is to have them do the “simple” things that we humans do. David Hanson is working to design robot faces look and act like ours. The prototypes he is demonstrating in this short TED video recognize and respond to emotion, and make expressions. Worth a look, even though it turns into a bit of a commercial at the end.