Scientists have unveiled a sprawling burial site in India belonging to one of the world's earliest urban civilisations. The BBC's Soutik Biswas delves into the clues the graves might give us about how the early Indians lived and died.In 2019, as scientists embarked on excavating a mound of sandy soil near a remote village in the sparsely populated Kutch region, situated not far from Pakistan in India's western state of Gujarat, they had no inkling of the surprise that lay in store for them. "When we began digging, we thought it was an ancient settlement. Within a week, we realised...