Trillions of microorganisms live on and in the human body, many of them essential to its function and health. These organisms, collectively known as the microbiota, outnumber cells in the body by at least five times.
Microorganisms in the intestinal tract, the gut microbiota, play an especially important role in human health. An investigation on the International Space Station, Rodent Research-7 (RR-7), examines how the gut microbiota changes in response to spaceflight, and how that change in turn affects the immune system, metabolic system, and circadian or daily rhythms.
Read more about RR-7: https://www.nasa.gov/mission_pages/station/research/news/microbiota_research
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For more information on how you can conduct your research in microgravity, visit https://go.nasa.gov/2q84LJj.
HD DOWNLOAD: https://archive.org/details/jsc2018m000638_Tiny_Organisms_Big_Impact