Psychologist Kimberley Wilson and Dr Xand van Tulleken take a journey around the human body, asking what it can tell us about our innate capacity for change. In this episode, Kimberley and Xand explore a body part they each thought they knew like the back of their hand. They hear about a neural-enabled prosthetic hand which can relay the sensation of touch, and discover the brain’s extraordinary ability to accommodate extra fingers and missing limbs. Producer: Dan Hardoon Researcher: Emily Finch Executive Producer: Kate Holland A Whistledown production for BBC Radio 4