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I assumed it was a kind of warning system: "Another member of the tribe detected impairment/fatigue and took measures to become more alert, perhaps you should r

by Terr_ 9mo ago

I assumed it was a kind of warning system: "Another member of the tribe detected impairment/fatigue and took measures to become more alert, perhaps you should raise alertness also."

rhcom2 9mo ago
Interesting you went in the opposite direction of my assumption, which was "another member is tired, perhaps we should all pack it it"
- Terr_ 9mo ago
  AFAIK yawning is something our bodies do to fight or delay sleep, rather than to get to sleep faster.