TOKYO, Jan 23 (Reuters) - Faced with a declining birth rate and a rapidly ageing population, Japan's toy makers have had to learn life's most sobering lesson: everyone must grow up. The industry that ...

Robots already have the potential to be creepy (those cold, dead eyes and unmoving faces only just add to the uncanniness of it all), but have you ever seen them dance? What about over 1,000 of them?

Teaching robots to dance with fluid and expressive motions was a new challenge for a company that spent years building robots that have functional abilities like walking, navigating in rough terrain, ...