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SciShow
This Worm-y Critter Is (Probably) Our Oldest Ancestor | SciShow News
Newly described wormlike fossils dating back over half a billion years might be our oldest ancestors, and researchers have mapped and visualized the physical structure of the microscopic communities growing on human tongues!
Science Friday Initiative
Science Friday: A Community of Thousands in Your Gut
We'll learn about new studies that take a census of just what lives inside your gut. Recent research indicates that the human intestines may be home to over 5,600 different bacterial species and strains.