Explaining Science to my Dad is back for a new series! In this episode, Lily answers a puzzling question from listener Shirley about why identical twins are often different. With help from Max, Sergio, and Colette from the Department of Twin Research & Genetic Epidemiology, King’s College London, Lily introduces Lloyd to the field of epigenetics, and explains why there might be more to the age-old nature vs. nurture question than we think.

Credits: Produced by Lily Shepherd. Featuring Colette Christiansen, Max Tomlinson, and Sergio Villicana Munoz. Podcast theme written exclusively for us by Ben Vize (@benvizemusic on Instagram).