Two Nature Biotechnology papers report that transplantation of human embryonic stem cell‑derived spinal cord neural stem cells (H9‑scNSCs) restored forelimb function in rhesus monkeys with spinal cord injury. The primary report documented extensive functional recovery in 53% of treated trials, with complementary analysis showing safety and mechanism data. Investigators highlighted durable motor improvement and neural integration signals that support clinical translation. Authors and journal editors framed the results as an important preclinical milestone for cell therapies targeting severe spinal cord injuries, while noting remaining translational and manufacturing hurdles.