The human digestive tract, host to an ecosystem teeming with trillions of living bacteria, comes in three variations as distinct as blood groups, according to a new study.
Source: http://www.cosmosmagazine.com/news/4254/new-types-human-gut-bacteria-found
Amanda Righetti Amanda Swisten Amber Arbucci Amber Brkich Amber Heard Amber Valletta America Ferrera
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