Microorganisms have colonized nearly every part of the world, including the human body. Advanced genetic techniques have revealed the presence of microbial communities in many places. Microbes live on our skin and inside of us, and they can have a significant impact on our health, physiology, and well-being, particularly when they reside in the gastrointestinal tract. The infographic below outlines some of the many characterisitics of microbiomes, and particularly the human gut microbiome, which has been studied extensively in recent years.