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Paryavaran dost is a Ranchi based organisation

Committee
Rough work The earliest authenticated human remains in South Asia date to about 30,000 years ago. Nearly contemporaneous Mesolithic rock art sites have been found in many parts of the Indian subcontinent, including at the Bhimbetka rock shelters in Madhya Pradesh. Around 7000 BCE, one of the first known Neolithic settlements appeared on the subcontinent in Mehrgarh and other sites in the subcontinent. These gradually developed into the Indus Valley Civilisation, the first urban culture in South Asia; it flourished during 2500–1900 BCE in northeast Afghanistan to Pakistan and northwest India. Centred around cities such as Mohenjo-daro, Harappa, Dholavira, and Kalibangan, and relying on varied forms of subsistence, the civilisation engaged robustly in crafts production and wide-ranging trade.