Picture a robot. What comes to mind? Perhaps a droid from Star Wars or The Jetsons: a machine that can move, speak and perform tasks all by itself. Or maybe your imagination jumps to humanoid robots à ...

Elon Musk has predicted there will be more than 10 billion humanoid robots by 2040. If the prophecy is accurate, robots could outnumber human beings in the future. 10 billion robots or more could be ...