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    Is yawning an infectious disease. Whye do people tend to yawn seeing another per

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Here are some friends with simlar question as we.And I have this question for many days,anyone help us?
Kitty said: Yes.Is yawning an infectious disease. Whye do people tend to yawn seeing another per-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(Is yawning an infectious disease. Whye do people tend to yawn seeing another per),it will help you,my kids.



Answers:
Why we yawn when we see others yawning has baffled scientists for ages and a number of suggestions have been put forward to explain this phenomenon. What we do know is that yawning is an involuntary action- our brain does it without us thinking about it, even very young babies yawn showing that it's a built in action (Chimps do it too by the way). Just thinking about yawning can trigger the bit of the brain that causes a yawn. http://www.ratlab.co.uk/yawn.htm

More theories can be found at the links below:

Other Answers:
No, its kind of emotional trigger which is created in ur mind when u see others..
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