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Why Do Nipples Get Hard?

(via D-News) Nipples tend to get hard when we're cold or aroused, but why? Julian explains that here. Send to a Friend | Permalink

You Have a Second Brain in Your Gut

(via AsapSCIENCE) Turns out you have TWO brains! Send to a Friend | Permalink

Posted by RCScience Staff | Biology - Thursday September 29th, 2016 | Send to a Friend