Master the Basics of Sleep
Understand sleep stages, cycles, and the science behind why we dream. Visual explanations made simple.
Sleep Stages in 90 Seconds
A quick visual breakdown of the four sleep stages (N1, N2, N3, and REM) and what happens in each phase of your sleep cycle.
What Happens in a 90-Minute Sleep Cycle?
Explore the complete architecture of a full sleep cycle, from light sleep through deep sleep to REM, and understand why the 90-minute pattern matters.
Why Do We Dream? The REM Explanation
Dive into the fascinating world of REM sleep and dreams. Learn why we dream, what happens in your brain during REM, and how dreaming supports memory.
Deep Sleep vs Light Sleep: What's the Difference?
Understand the critical differences between deep sleep (N3) and light sleep stages, and why both are essential for different aspects of restoration.
How Much Sleep Do You Really Need?
Debunking the one-size-fits-all approach. Learn how age, genetics, and lifestyle factors influence your individual sleep requirements.
The Science of Sleep Pressure
Deep dive into adenosine buildup, sleep homeostasis, and why you feel increasingly tired throughout the day.
Explore More Topics
Check out our other visual explainers on circadian science and myth busting.