The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
There are good data to show that when you learn spatial, new spatial environments that there's a replay of those environments, so-called place cells that fire in your brain only when you enter a particular environment, that those are replayed in sleep in almost direct fashion to the way that things were activated when
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.
The other thing that happens in REM sleep is a replay of certain types of spatial information about where we were and why we were in those places.
The other thing that happens in REM sleep is a replay of certain types of spatial information about where we were and why we were in those places. And this maps to some beautiful data and studies that were initiated by a guy named Matt Wilson at MIT years ago showing that in rodents. And it turns out in non-human primates and in humans, there's a replay of spatial information during REM sleep that almost precisely maps to the activity that we experienced during the day as we move from one place to another.
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.