Can you drink a black hole? Is sand evil? All these questions and more are put to our smartest guest yet, Professor Brian Cox. Professor Brian Cox is on tour with ‘Horizons’. Dates and tickets at briancoxlive.co.uk. Follow Brian on Twitter and Instagram @ProfBrianCox Recorded and edited by Ben Williams for Plosive.Artwork by Paul Gilbey (photography and design) and Amy Browne (illustrations).Follow Off Menu on Twitter and Instagram: @offmenuofficial.And go to our website www.offmenupodcast.co.uk for a list of restaurants recommended on the show.Watch Ed and James's YouTube series 'Just Puddings'. Watch here. See acast.com/privacy for privacy and opt-out information.