Yes, mining technique vary according to the different periods of prehistory, from the Middle Palaeolithic onwards.
We have no evidence, but they certainly had, because complex culture needs to transmitted by specialized institutions.
I was watching the 6 part BBC's 'Story of India' and had a thought about the abandonment of the Indus cities and migration eastward due to the failure of the monsoon.
Did the Indus valley civilization people cultivate paddy or wheat? Was their diet vegan or vegetarian? 3 scholars reply.
Answered by Mayank Vahia.
Once in a while a book comes along that so radically shifts your perspective and ways of thinking about a complex subject that it can only be called breathtaking. Against the Grain A Deep History of the Earliest States (2017), by Yale Agrarian Studies Professor James C. Scott is one such book.
The Babylonian texts like Code of Hammurabi in Akkadian and Sumerian seals of Urukagina state legal codes and regulations. Although the Indus script hasn't been deciphered, have any of the excavations resulted in similar seals which contain major textual references or is the Indus script just used as a tool for decoration?
Would it not be good idea to publish them so many people can see them and try their conclusions?
An exploration of the prevalence and manufacture of a distinctive ornament which persists both in South Asian culture today, and throughout the larger West Asian and Middle Eastern world as well.
"There can be no doubt that some Indus seals are fine artistic achievements. Probably one of the main functions of the seal's iconographic motifs, and the quality of their carving, was to convey the status of the seal owner."