Understand the biology, neuroscience, and psychology of sleep. Learn how your body clock works and why sleep is essential for health.
Discover what happens in your brain and body during each stage of sleep, from light sleep to deep REM.
Science-based recommendations for sleep duration by age, plus how to know if you're getting enough.
Can you catch up on lost sleep? Learn what research says about sleep debt and recovery sleep.
Master your body clock with light exposure, meal timing, and temperature regulation strategies.
What happens in your brain while you sleep? Explore the latest neuroscience research.
Why babies sleep 16 hours but adults need 7-9. Understand sleep across the lifespan.