Scientists create robots smaller than a grain of salt that can think
AI Summary: Researchers from the University of Pennsylvania and the University of Michigan have developed the smallest fully programmable autonomous robots, measuring approximately 200 by 300 by 50 micrometers. These light-powered robots can swim through liquids, sense their environment, and operate autonomously for months, costing about one penny each to produce. Unlike previous miniature robots, they do not rely on wires or external controls, enabling true autonomy at a microscopic scale. The robots utilize a novel method of movement by generating electrical fields to propel themselves, allowing for complex navigation and coordination akin to schooling fish.