The newest frontier in robotics is almost invisible to the naked eye. Researchers have built a robot smaller than a grain of salt that can not only move through its environment but also sense what is ...

With more than a decade of experience, Nelson covers Apple and Google and writes about iPhone and Android features, privacy and security settings, and more. Robots smaller than a grain of salt? It ...

Robots that can think and move are no longer confined to factory floors or humanoid prototypes. Researchers have now shrunk fully programmable machines to a size smaller than a grain of sand, packing ...