Living in modern society, it can be easy to forget how many different types of people exist in this world. In the era of electric cars and space exploration, there still exist many hidden ancient tribes and people about whom we know very little about. They seem almost mythical, characters out of stories or games. But in reality, they exist, living in remote areas and isolated locations, uncontacted by the outside world for years. Some of them might be friendly, others, not so much. From cannibals to people with unknown genes, today we take a look at 15 scariest tribes you don't want to meet.