The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
I'm on the second floor here. I don't actually close this all the way. Even though the air conditioning is working, I'm not going to close this all the way. I'm going to close it most of the way. This isn't the most absolutely energy efficient thing, but I want air circulation in the room. I want there to be some air flow because I'm thinking about the CO2 level in the room.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Open a window before bed — even a small crack significantly boosts airflow and prevents CO₂ buildup
According to @DrAndyGalpin, improving bedroom ventilation is the best strategy.
Can you get high ventilation in that room before you go to bed? Have your doors and windows open. Get that number down.
10 minutes of bright outdoor light within the first hour of waking anchors the circadian phase and improves sleep onset that night.
Morning sunlight exposure shifts the cortisol awakening response forward, improving daytime alertness.
Long-term morning sunlight reduces age-related macular degeneration risk.
Sleep regularity predicts all-cause mortality more strongly than sleep duration.
Tracking deep sleep on a wearable accurately reflects EEG-measured slow-wave sleep.
Caffeine has a half-life long enough that consumption after 2pm measurably degrades deep sleep in slow metabolizers.