Sleep Science Explained

This article breaks down the stages of a sleep cycle and explains why waking mid-cycle feels worse than waking at the end of one. Readers come away with a working sense of how to time sleep in blocks rather than by the clock alone.

This piece defines sleep debt in concrete terms and looks at what research says about recovering from it gradually versus all at once. It also addresses whether weekend catch-up sleep genuinely offsets a short week.

This explainer compares how light exposure at different times of day shifts the body's internal clock, and why morning light tends to matter more than most people assume. It offers a simple framework for timing outdoor time and screen use.