Dr Hannah Fry is a mathematician and complexity scientist from University College London’s Center for Advanced Spatial Analysis. Fry also regularly presents the Number Hub strand of BBC Worldwide’s YouTube channel, and regularly appears on radio and tv in the UK, most recently Climate Change by Numbers on BBC4. Her first TED talk attracted more than 500,000 views and evolved into her first book, The Mathematics of Love.

Jon Ronson is an award-winning writer and documentary maker. He is the author of many bestselling books, including Frank: The True Story that Inspired the Movie, Lost at Sea: The Jon RonsonMysteries, The Psychopath Test, The Men Who Stare at Goats and Them: Adventures with Extremists. His first fictional screenplay, Frank, co-written with Peter Straughan, starred Michael Fassbender. Jon’s latest book is So You’ve Been Publicly Shamed.