Faceless' Indus Valley City Puzzles Archaeologists

This article talks about how the Indus valley civilization disappeared. Well, there are a lot of theories, one of the theories says that there was an earthquake and that it destroyed the city of Mohenjo Daro. The other one is that because of the floods the farmers left because the fertile soil was turning into a desert. However, no one dose really know what actually happened. The Indus valley civilization was discovered  in 1911. There is no evidence of the civilization. We don't know how they lived, where they lived, if they had any rulers. We don't know if they had a priest or a king or queen because there is nothing left.

Roach, John. "'Faceless' Indus Valley City Puzzles Archaeologists." National 
     Geographic. N.p., n.d. Web. 18 May 2011.
     <http://science.nationalgeographic.com/science/archaeology/mohenjo-daro/>.