10 Civilizations That Mysteriously Vanished

(via Listverse) Gone, without a trace. Mass disappearances are a very real and bizarre thing in which large numbers of people suddenly disappear without a trace, for seemingly no reason.  Entire civilizations, cities, and empires have faded away, and today’s archaeologists and researchers often try to retrace their inhabitants’ steps and reconstruct what exactly happened to see if we can find a cause. Here are ten civilizations that just up and vanished mysteriously.