““Humans are actually reservoir hosts for countless bacteria and viruses that haven’t even been classified yet. About twenty percent of the genetic information in the nose doesn’t match any known or cataloged organism. In the gut, forty to fifty percent of all the DNA is from bacteria and viruses that have never been classified. Even in the blood, up to two percent is a sort of “biological dark matter.” In many ways, this biological dark matter, this sea of unknown viruses and bacteria, is the ultimate frontier.””
![“[Bacteria are the] dark matter of the biological world [with…” quote by E. O. Wilson](https://sms4smile.com/quotes/img-quotes/bae/e-o-wilson-1348_bacteria_bacteria-are-the-dark-matter-of-the-biol_2826471.jpg)
