There was a study where participants were asked to swab their belly buttons and lots of new organisms were found. https://www.theatlantic.com/health/archive/20

There was a study where participants were asked to swab their belly buttons and lots of new organisms were found. https://www.theatlantic.com/health/archive/2012/12/1-458-bacteria-species-new-to-science-found-in-our-belly-buttons/266360/ https://www.theatlantic.com/health/archive/2012/12/1-458-bac...