A 40-year-old man whose legs were paralyzed in a cycling accident 12 years ago can walk again thanks to implants in his brain and spinal cord. The brain-spine interface (BSI) has remained stable for a year, allowing Gert-Jan Oskam to stand, walk, climb stairs and traverse complex terrains, according to a study published Wednesday in the journal Nature. Oskam even regains some control over his legs when the BSI is turned off. "My wish was to walk again and I believed it was possible," Oskam said during a news briefing. Oskam was in the accident in China and thought he...