If you have a teen in your life, you know their communication and self-exploration revolves around screens. Parents and their children have been grappling with that fact for decades, but a new book explores the latest research and firsthand accounts of adolescent development, independence and the digital world.

Minneapolis-based author Erin Walsh wrote “It's Their World: Teens, Screens and the Science of Adolescence,” which comes out May 13. 

Walsh joined MPR News host Nina Moini to talk about the latest research on the teenage brain and tech.