 It was found that the navel microbiomes only contained a few prevalent types of bacteria (Staphylococcus, Corynebacterium, Actinobacteria, Clostridiales, and Bacilli) and many different types of rare bacteria.Other types of rare organisms were discovered inside the navels of the volunteers including three types of Archaea (an organism that usually lives in only extreme environments) and two of the three types of Archaea were found in one volunteer who claimed not to have bathed or showered for many years.