Scientists built a tiny robot that runs purely on light with no batteries, processors, motors, or electronics anywhere inside it.
At the same time, engineers discovered how ordinary rice grains can form intelligent metamaterials that change their strength depending on how forces are applied.
Military researchers are testing cyborg cockroach swarms for reconnaissance, powerful quadruped robots are getting faster and stronger, and humanoid machines are beginning to appear inside real factories.
From mechanical intelligence and adaptive materials to robots assembling car parts and even robot monks answering questions in temples, robotics is expanding into places few people expected.