An oldie but a goodie. Humans are extreme environments 👇 16S sequencing of people's bellybuttons found extremophile bacteria (see ice caps and hydrothermal vents) living in one guy who hadn't washed in several years.
What Lives in Your Belly Button? Study Finds "Rain Forest" of Species via
“Some belly buttons harbored as few as 29 species and some as many as 107, although most had around 67.” What Lives in Your Belly Button? Study Finds "Rain Forest" of Species