Laughing is weird if you think about it -- a physical response to something we find funny, or even uncomfortable. Guest host Annie Gaus explains why we do it.
via Discovery News http://news.discovery.com/human/videos/why-do-we-laugh-video.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/human/videos/why-do-we-laugh-video.htm#mkcpgn=rssnws1
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