If you are not aware of the fact then a group of North Carolina based researchers has revealed that belly button is also a home to a number of bacterial species. They have carried out a project named as Belly Button Biodiversity
(BBB) project in which they revealed that bacteria species love to hang out in navel.

The study, which has been published in the journal PLOS One, is based on the study findings of 60 navels assessment. The assessment that was carried out in the US showed that human navel is home to a number of bacteria. The study was able to find more than 2,000 such species.

There were some instances, where one kind of bacteria was present in enormous amount. "Several recent studies suggested that skin bacteria have a beneficial effect on skin immune function", said study authors.

The study authors were of the view that there are chances that shape of belly button is able to reflect about bacteria that will reside in it. They affirmed that the project has found 2,368 bacterial species and out of it, 1,458 are completely new to the science. It is said that further study will be needed, so that more can be known about such species.