Q:

Why is yawning contagious

Answer

Yawning releases carbon dioxide (CO2). Large groups produce large amounts of CO2, yawning gets rid of it.

Categorized In: Conditions & Illness , Health , Biology

Source: Why is yawning contagious? | health.howstuffworks.com

Sep 30 2009, 06:52pm

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More ChaCha Answers (4)

Some current theories focus on yawning as a social cue (like laughing) that communicates information and helps organize ...more?

In an effort to find the answer, the Finnish government funded a brain study. The results confirmed it is unconscious. ChaCha on!

Jul 09 2009, 02:15am | Source: Why is yawning contagious? | www.world-science.net

Seeing someone yawn activates the superior temporal sulcus in the brain which causes us to mirror actions, hence it's contagious.

Apr 29 2009, 06:40pm | Source: Why is yawning contagious? | www.world-science.net

In an effort to find the answer, the Finnish government funded a brain study. The results confirmed it is unconscious. ChaCha on!

Apr 11 2009, 12:21am | Source: Why is yawning contagious? | www.world-science.net
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