U.S. researchers found, after two years of quite extended examination to 60 intrigued volunteers, most belly buttons harbored around 67 species of bacteria, some as few as 29 species and some as many as 107.
They discovered 2,368 species of bacteria, 1,458 of which may be new to science, 92 percent of them showed up on fewer than 10 percent of subjects.
“The belly button is one of the habitats closest to us, and yet it remains relatively unexplored. We analyzed bacteria and arachaea from the belly buttons of humans from two different populations sampled within a nation-wide citizen science project.”
Image credit: wikipedia
source Plos One