Researchers developed novel flexible, soft, and multifunctional bioelectronic fibers capable of dense sensing and stimulation within ultra-small, stretchable architectures, overcoming limitations of static implanted devices. Parallel work unveiled a dynamic soft electrode for brain-computer interfaces that adapts physically, enabling better neural activity recording. These innovations promise enhanced longevity and precision for neural prosthetics and bioelectronic applications, advancing neuroscience research and clinical neurotechnology.