The mysteries of the Indus Valley civilisation

Archaeologists do not understand everything about the Indus Valley civilisation because we cannot read their writing. There is no evidence of how these places were ruled or governed, but they were clearly very well organised. Their religion is a mystery to us, although they made lots of figurines that may have been offered to gods. There are pictures of figures with horns or controlling animals, which historians know other Asian people believed in. There are buildings that archaeologists thought were granaries, but now aren't sure because no grain has been found.