This episode explores the science of sleep and strategies for improving sleep quality, featuring Matt Walker as the expert guest. The discussion begins with an analysis of sleep aids like Ambien and Lunesta, which Walker argues provide sedation rather than naturalistic sleep, contrasting them with newer DORA drugs that gently dial down wakefulness. Against the backdrop of sleep medication, Walker offers five actionable steps for better sleep: maintaining regularity in sleep schedules, prioritizing darkness before bed, being mindful of alcohol and caffeine intake, and establishing a consistent wind-down routine. As the discussion pivots to Peter Diamandis's sleep data, analyzed through Walker's company Nightfall IQ, it reveals the impact of stress on REM sleep and the benefits of high-intensity interval training on heart rate variability. More significantly, the analysis identifies personalized factors predicting Diamandis's best and worst nights of sleep, such as lower heart rate and consistent bedtimes. The episode concludes with Diamandis highlighting the importance of sleep as a foundation for longevity and offering listeners a discount to Nightfall IQ.