The Science Weekly team are taking a summer break – well, some of them – and so we’re bringing you an episode from the archive. And not just any episode, one of Nicola Davis’s favourites. Back in 2017, Nicola sat down with with Dr Kathryn Harkup to discuss a shared love of crime fiction and the chemistry contained within their poisonous plots. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>
