When was the last time you thanked the bugs in your belly? Even if the concept of a “healthy” microbiome is flawed, the trillions of microorganisms living in your gut (and mouth, and vagina, and nose, etc.) play a vital role in many of your body’s functions. They’re so essential, many refer to the microbiome as an organ.

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[XKCD]


Contact the author at rtgonzalez@io9.com.

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