The department of
Sleep
Sleep is the nightly repair cycle that shapes mood, memory, and metabolism — find essays on insomnia, sleep hygiene, REM cycles, and honest mattress notes.
Pieces
6
Sleep
July 2026 · 7 min
Can You Buy Your Way Out of Sleep Inertia? Nine Weeks, $612 of Hardware, One Very Tired Test Subject
Here's the question, asked the way I actually asked it — 6:40 a.m., mug in hand, no memory of having filled it: can you buy your way out of sleep inertia? Not fix your sleep. Fix the hour after it.
By Claire Munroe · Read →
Sleep
July 2026 · 6 min
Samsung Health AI Features vs. My Sleep Data: Six Weeks Trying to Get It Back
Here is the question I could not stop turning over, somewhere around the fourth night of sleeping in a watch: if I let Samsung Health AI features grade my sleep every night, whose sleep is it…
By Megan Caldwell · Read →
Sleep
July 2026 · 10 min
One Espresso, One Night, One Number: How to Read Health Trends Without a Lab
On a Tuesday in February I drank a double espresso at 4:12 p.m. — call it 150 milligrams of caffeine — specifically because I wanted to catch my own sleep in the act of falling apart.
By Megan Caldwell · Read →
Insomnia
July 2026 · 5 min
What the Fecal Transplant Insomnia Trial Actually Showed — and What Happened When I Tried the Grocery-Store Version
The number that got my attention was fourteen. That's roughly how many percentage points of sleep efficiency a small randomized trial reported gaining in adults with chronic insomnia after a course of…
By Samuel Briggs · Read →
Sleep
July 2026 · 6 min
The Two Hours in the Middle: What the Biphasic Sleep Study Actually Measured
The number is two hours. In 1992, the psychiatrist Thomas Wehr ran an experiment that still anchors almost every serious conversation about biphasic sleep.
By Daniel Whitfield · Read →
Sleep
July 2026 · 5 min
Sleep Apnea Symptoms: Why the Loudest Sign Is the One You Can't Hear
The most useful symptom of sleep apnea is not the sound you make at night. It's the person you become during the day. That runs against how the condition gets talked about.
By Marcus Webb · Read →
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