2006-06-18 23:11:13 · 6 answers · asked by fancy 1 in Science & Mathematics ➔ Other - Science
When a person yawns it is usually due to the lack of oxygen to the brain. When we see a person yawning our brain interprets it as low level of oxygen in the air.As a result we yawn.
2006-06-18 23:28:32 · answer #1 · answered by slick_geek 2 · 0⤊ 0⤋
The only agreed upon theory is that this 'contagion' of yawning has a function of syncronizing the sleep of co-habitating family members. Perhaps it ensures that minors requiring supervision sleep when the adults sleep, or that all wake and sleep together to maximize their ability to help each other.
It is 'herd' or 'pack' instinct.
2006-06-20 04:05:37 · answer #2 · answered by oohhbother 7 · 0⤊ 0⤋
this may well be a exceedingly debated situation, yet i think of it deals with air tension. once you yawn, the air tension in the room differences, so others might desire to yawn to neutralize their ears too. Its strange.
2016-12-08 22:35:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
i didnot know that ......anywayz it could be coz they feel boring watching the yawning person
2006-06-18 23:21:25 · answer #4 · answered by nora 3 · 0⤊ 0⤋
human nature
why we always wear good clothes while giving an interview
why blue soothes our eye not red
2006-06-18 23:39:46 · answer #5 · answered by Great Advisor 2 · 0⤊ 0⤋
cos "monkey see what monkey do"
*~*
(we were apes)
2006-06-18 23:15:20 · answer #6 · answered by *~*♥wateva♥*~* 2 · 0⤊ 0⤋