①Yet this is not an ordinary ballet dancer, but a robot in the form of a swan，created at Malardalen University. The swan robot's just over four­minute­long dance has so far been seen only by a select few. ②But it has already made a big impression. Tearful eyes and words like “touching”，“fascinating” and “beautiful” are some of the reactions. ③“We want to explore the limits of what a robot can do, what human expressions it can imitate, and how it affects people's perception of the robot when it makes an appearance in art and dance，” says Lars Asplund, Professor of Computer Science at Malardalen University in Sweden.