KOLKATA: It may be time to rewrite history textbooks. Scientists from IIT-Kharagpur and Archaeological Survey of India (ASI) have uncovered evidence that the Indus Valley Civilization is at least 8,000 years old, and not 5,500 years old, taking root well before the Egyptian (7000BC to 3000BC) and Mesopotamian (6500BC to 3100BC) civilizations. What's more, the researchers have found evidence of a pre-Harappan civilization that existed for at least 1,000 years before this.
The discovery, published in the prestigious 'Nature' journal on May 25, may force a global rethink on the timelines of the so-called 'cradles of civilization'. The scientists believe they also know why the civilization ended about 3,000 years ago — climate change.
"We have recovered perhaps the oldest pottery from the civilization. We used a technique called 'optically stimulated luminescence' to date pottery shards of the Early Mature Harappan time to nearly 6,000 years ago and the cultural levels of pre-Harappan Hakra phase as far back as 8,000 years," said Anindya Sarkar, head of the department of geology and geophysics at IIT-Kgp. [...] Times of India / Link 2