New Delhi, July 3 -- Elon Musk's Neuralink has always been surrounded by big promises and even bigger questions. Can a chip in the brain really change the lives of people who have lost the ability to move? In Miami, the answer is starting to look like yes. A clinical trial at the University of Miami Miller School of Medicine is showing what happens when such novel technology operates as intended, and the results are hard to ignore.

RJ, a military veteran paralysed in a motorcycle accident, is now part of a small group in the US to receive the Neuralink implant. The device, about the size of a coin, is meant to help people with severe paralysis operate computers, smartphones, and other devices with their minds. For RJ, it meant playing vi...