Sleep science · Plain English
The blog
Evidence-backed articles on sleep biology, common disorders, and what actually works to improve sleep.
- Read →Science· 7 min read· Apr 12, 2026
The four stages of sleep, explained
Light, deep, and REM sleep — what happens in each stage and why all four matter.
- Read →Science· 6 min read· Apr 8, 2026
What REM sleep does for your brain
REM consolidates memories, regulates emotion, and grows the brain. Here's the evidence.
- Read →Disorders· 9 min read· Mar 30, 2026
What actually causes insomnia
Insomnia is a learned pattern, not a personality trait. Here's how to unlearn it.
- Read →Tips· 5 min read· Mar 22, 2026
Blue light and sleep: separating signal from noise
Yes, blue light suppresses melatonin. But the real culprit may not be the wavelength.
- Read →Science· 6 min read· Mar 15, 2026
How much sleep do you actually need?
By age, by goal, by genetics. Including the rare "short sleeper" gene.
- Read →Science· 7 min read· Mar 8, 2026
Circadian rhythm: the master clock
How your body keeps time, and what jet lag, shift work, and weekend lie-ins do to it.
- Read →Disorders· 6 min read· Feb 28, 2026
Sleep apnea: signs you shouldn't ignore
Loud snoring isn't normal. Here's when to suspect sleep apnea and what to do.
- Read →Tips· 4 min read· Feb 20, 2026
The best temperature for sleep (and why it matters)
65–68°F isn't arbitrary — it's the temperature at which your body can shed heat fastest.
- Read →Tips· 5 min read· Feb 12, 2026
Are naps good or bad? It depends on the nap.
20 vs. 90 minutes, and what to do if you're an insomniac.
- Read →Lifestyle· 5 min read· Feb 4, 2026
Why exercise improves sleep — and the timing trap
Movement increases deep-sleep duration. But late-evening workouts backfire.
- Read →Lifestyle· 5 min read· Jan 28, 2026
Why a nightcap ruins your sleep
Alcohol helps you fall asleep — and then destroys the sleep that follows.