????? why is it when somone around you yawns you end up yawning too?
Noones answered this ask with any authority - there are a short time ago theories.
One theory is the yawn be a signal used in the caveman days. Since its contagious, it spreads, making it an significant signal.
It's just a psychological condition.
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Yawning a sign of a lack of oxygen in environment or body, others are also alerted from initial yawn.
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