The Indus Valley civilisation left no temples or tombs ... So, we know they had access to precious metals, and the skills and technology to work the metals. There have been lots of artefacts ...

There were more than 1,400 towns and cities in the Indus Valley. The names Harappa and Mohenjo-Daro were given to the cities in later times. We do not know what the Indus people called their ...