I thought I had started this already, but it seems I messed up somehow. I saw this while I was looking at science news. It is about the third place lately that I've come across talking about biodiversity on human skin. One I saw recently said that something like 90% of the DNA on the human body isn't human, it is from our little friends. This article amused me so I thought I would share.. http://www.huffingtonpost.com/2012/11/08/belly-button-bacteria-navel_n_2093501.html I'm glad I'm not the one doing the sampling.