Ian Sample and science correspondent Hannah Devlin discuss the big science stories of the week – from news that Elon Musk’s Neuralink has implanted its first chip into a human, to research suggesting Alzheimer’s can pass between humans in rare medical accidents, and the revelation that Rishi Sunak begins each week with a 36-hour fast. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>
