The human body has about 10 million cells, but it hosts up to 100 trillion bacteria. So this means that we carry more bacterial cells than human ones. And this makes us more bacteria than we are humans.

Well, lucky for us, they live on us without causing disease, but they do make their presence known. Watch Kurzgesagt – In a Nutshell explains the mysterious world of our microbiome, and how bacteria rule over our body.

[Video: Kurzgesagt – In a Nutshell]