This podcast episode explores the impact of smartphone use on mental health, particularly in girls. It discusses the rise in depression and anxiety rates in girls around 2012, highlighting the potential causal link between smartphone use and the decline in mental health. The podcast also touches on the decline of play-based childhood, the loss of community trust, and the consequences of the rewiring of childhood through smartphone and tablet use. It examines the differences between boys and girls in their online behavior and interests, as well as the negative effects of pornography, dating apps, and instant gratification on courtship and social skills development. The importance of natural play, social interaction, and trust in groups is emphasized, along with the need for regulations to protect children from the harmful effects of smartphone use. The podcast concludes by discussing the significance of puberty as a critical developmental milestone and the potential negative impact of excessive smartphone use on normal brain development.