5 Civilizations That Just Disappeared

...the Mayans were an incredibly advanced society believed to have the only complete written language in the pre-Columbian Americas. They were also renowned for their art, their architecture, and just being plain awesome. They were a brilliant, diverse civilization with more advancements than most other cultures in the world. And then, somehow, their entire civilization disappeared between the years 800 and 900 AD. There are some obvious theories as to what happened, including invading “explorers” wiping them out, famine, or maybe they just realized that since the end of the world was coming, they’d go ahead check out early.