MIT researchers have unveiled a breakthrough in neural interfaces: soft, hydrogel-based implants that can be injected into the bloodstream or brain to treat conditions like Parkinson's and paralysis. Unlike rigid metal probes, these "circulatronics" and light-responsive gels mimic human tissue, minimizing scarring. This innovation represents a global leap toward accessible, non-invasive bioelectronics that prioritize patient safety and quality of life.