What archaeologists have found out about the Indus Valley civilisation

Archaeologists have uncovered all sorts of objects that tell us about the great cities of this farming civilisation. Archaeologists have asked lots of questions about the objects to try and work things out about these people. From these questions about the objects, they have found out lots of things about these people and their cities. However, there are still many mysteries about these people because archaeologists cannot understand their writing. A good explanation of what archaeologists think they know about this subject will use knowledge from across this unit.