The Indus river begins high up in the Himalayan mountains (the tallest mountain range in the world), and flows nearly 3,000 kilometres to the Arabian Sea. As the river moves downstream it carves ...

What were they scared of? Why did this happen? Trade was very important for the Indus civilisation. Their main trade partner was Mesopotamia, which was an advanced civilisation in the Middle East.

But the Indus water tower, the researchers point out ... The much reduced size of the Aral Sea, which both rivers ultimately feed, is evidence of this. "What we recommend in our study is that ...