In a programme-length interview, Kenan Malik talks to neuroscientist Prof Susan Greenfield. In her role as director of the Royal Institution, a body dedicated to scientific research and education, she has presided over an extensive revamp of it, with the aim of bringing the public closer to science. As well as discussing her passion for democratising science, she talks about the questions raised in her new book ID: The Quest for Identity in the 21st Century, in which she argues that our individuality faces an increasing threat from new technologies.