Two archaeologists belonging to the Archaeological Survey of India recently concluded based on their research, which is yet to be published, that the new dates from excavations show the Harappan culture began around 2000 years earlier than previously thought.
Producing details from their research, BR Mani and KN Dikshit said in their presentation at the Conference: "The preliminary results of the data from early sites of the Indo-Pak subcontinent suggest that the Indian civilisation emerged in the 8th millennium BC in the Ghaggar-Hakra and Baluchistan area. On the basis of radio-metric dates from Bhirrana (Haryana), the cultural remains of the pre-early Harappan horizon go back to between 7380 to 6201 BCE."
If found true, their version would overthrow the current theory that the settlements in the Indus region began around 3750 BCE. It would also put the origin of Harappan Culture roughly on the same time as the rise of civilisation in Mesopotamia. The first definitive Mesopotamian civilisation of Sumer emerged in the Ubaid period around 6500 BCE.