Why Do We Blush?

Aw, don’t be embarrassed everyone does it! Quick Questions explains what causes blushing, which Darwin called “the most peculiar and most human of all expressions.”
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Sources:
http://science.howstuffworks.com/life/blush.htm

The Science of Why We Blush, Animated


http://guidance.nice.org.uk/IPG480
http://home.swipnet.se/sympatiska/nervous.htm

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