sleep efficiency
HoldTechniques
A measure of how much time in bed is actually spent asleep.
Why it's here
Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 4Hacker News·8/19/2026researchWhy Human Sleep Evolved Differently
The article explores evolutionary anthropologist David Samson’s research on why humans sleep fewer hours than other primates despite needing sleep for cognition, health, and social functioning. Drawing on fieldwork with the Hadza and other communities, it argues that human sleep evolved through shelter, fire, environmental preparation, and social factors rather than a simple model of long, uninterrupted rest.