A startup company, Heliospect Genomics, is offering to help wealthy couples screen their embryos for IQ using controversial technology that raises questions about the ethics of genetic enhancement. Science correspondent Hannah Devlin tells Madeleine Finlay about the joint investigation into the company by the Guardian and the campaign group Hope Not Hate. Help support our independent journalism at <a href="https://www.theguardian.com/sciencepod">theguardian.com/sciencepod</a>