Most adult animals on Earth share one thing in common: brown poop. But what's in it that makes it that particular color? Trace does the dirty work to find out.
via Discovery News http://news.discovery.com/human/videos/whats-in-your-poop-video.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/human/videos/whats-in-your-poop-video.htm#mkcpgn=rssnws1
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