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A few interesting facts about the human brain (20 Photos) » human-brain-0

Author: Mac | April 18, 2012 | In: Facts, Interesting, Mind Blowing

human-brain-0

Andrew

Anyone else yawn when they saw this picture?
http://www.facebook.com/profile.php?id=100001741594358 Matt Hernandez

Then why do we yawn when we are tired??

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