Professor Essi Viding is a Professor of Developmental Psychopathology and the Pro-Vice Provost for the Mental Health and Wellbeing Grand Challenge at UCL. Essi is psychologist who works to understand the origins of behaviour and mental health disorders. In this episode Essi describes the developmental origins of mental health problems, the recent rise in mental health problems in adolescents and the role of social media, and the importance of supporting women to pursue careers in science.