How far back does archaeological evidence show humans living in Rajasthan?

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Archaeological evidence indicates that early humans have lived in the region now known as Rajasthan for at least 400,000 years. Hand axes discovered at Didwana, which are similar to those found in the Shiwalik Range, have been dated to approximately that time. Additionally, evidence shows that early humans inhabited the areas along the banks of the Banas River and its tributaries roughly 100,000 years ago.12