Ian Sample talks to Kathryn Paige Harden, a behavioural geneticist and professor of psychology at the University of Texas at Austin. In her book Original Sin she explores how nature and nurture combine to influence our likelihood of committing crimes, and asks whether the ‘cause’ of our actions matters for how we think about culpability

Jenny Kleeman investigates ‘Biotech Barbie’ Cathy Tie, the controversial entrepreneur hoping to revolutionise human reproduction by letting parents edit their embryos