You have roughly 69 trillion cells in your body, but only about half of those are human. The rest are bacterial — and, we should mention, that figure doesn't even count the many viruses living within you. And those non-human cells? Scientists accidentally discovered that almost all of them are unknown to science. It's a great big, very tiny world in there.
Microbes: The Final Frontier
Meet Your Microbiome!
Written by Ashley Hamer September 19, 2017
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