The Ancient Microbes Inside Humans That Changed Everything

Ancient humans feared wolves, big cats, hunger, cold, darkness, and wounds. But some of the most powerful forces in their lives were too small to see. This video explores the hidden world of ancient microbes — bacteria, fungi, viruses, parasites, and invisible life forms that lived inside human mouths, guts, wounds, food, water, animals, and early settlements. Ancient people did not know what microbes were, but microbes still shaped their pain, sickness, survival, food, movement, and history. Ancient humans were never alone. Before humans discovered microbes, microbes had already discovered humans.