An accident left Noland Arbaugh paralysed, but Musk’s Neuralink brain implant allows him to control computers with his thoughts. Is it a life-changing innovation that could help millions – or the start of a dystopia where a billionaire can access our thoughts?
How long does it take to change a habit? It varies, but one paper suggests the average is 66 days. We asked writers to change one thing in their lives within that timeframe … and tell us if it works