Dr Matthew Walker is a Professor of Neuroscience and Psychology at the University of California, Berkeley, and one of the world’s leading experts on sleep science, with over 20 years of research.

He is host of The Matt Walker Podcast and bestselling author of ‘Why We Sleep: The New Science of Sleep and Dreams’.

He explains:

• The shocking link between poor sleep timing and increased cancer risk
• How alcohol and caffeine silently sabotage deep sleep and mental performance
• Why screen time and light exposure before bed are secretly rewiring your brain
• How “sleep banking” before stress, travel, or work sprints can boost resilience
• Why parents, professionals, and athletes all need radically different sleep strategies