Whether they make you fat, fart, or freak out, microbes play a central role in your life. Right beneath your nose—on your face, in your gut, and everywhere in between—trillions of bacteria, viruses, and fungi are so abundant in your body, they outnumber your human cells. But these aren’t just nasty hitch-hikers. Many are crucial to your survival.

Originally released by PBS, 2018. Streaming video file encoded with permission for digital streaming by Infobase on August 29, 2019.

Microbial Companions (5:23); --Face Mites (2:52); -- Microbiome (2:38); -- Discovering Microbes (3:09); -- Antibiotics (2:36); -- Bacteria and Immune Related Diseases (2:47); -- Health Benefits of Microbial Exposure (3:15); -- Gastric Ulcers (4:11); -- Mapping the E. Coli Genome (2:59); -- Fecal Transplants (8:47); -- Microbiome and the Brain (2:18); -- Neurological Diseases and Gut Bacteria (4:19); -- Future Microbiome Research (4:49); -- Credits: What's Living in You? (1:01); .